liuxuestudy - 2008-8-17 1:55:00
In his plays, Shakespeare intentionally had some of his characters use phrases he considered ungrammatical.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
The phrase "between you and I" appears infrequently in Shakespeare's writings.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
The more modern an English word or phrase, the less likely that modern grammarians will consider it acceptable for formal usage.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Many modern speakers of English sometimes say "between you and I" and sometimes say "between you and me."cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Most native speakers of English who choose to say "between you and I" do so because they know that Shakespeare used that phrase.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
答案:(A)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Around 1850 there were about 800 farms in Otsego County. By the 1950's the number of farms had dropped to around 400. By 1988 there were only 81 farms in operation. Therefore, the amount of land in the county that is devoted to farming has dropped by about 90 percent in the past 140 years. cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
A major flaw in the argument above is that itcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
counts the number of farms only approximatelycC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
fails to say whether the use now being made of the land previously devoted to farming is income-producingcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
ignores the possibility that the average size of farms has changedcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
gives data for only 3 of the past 140 yearscC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
does not take into account the type of product or crop each farm yieldscC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
答案:(C)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Senator: Jones is highly qualified for appointment as a judge, as evidenced by Jones's receiving a unanimous vote of "qualified" on the formal rating scale used by the Lawyers' Committee. That committee advises the Senate on judicial appointments. cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Which of the following, if true, is the best reason for dismissing the senator's claim that Jones is highly qualified?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Several members of the Lawyers' Committee are not themselves qualified for judicial appointments.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
The Lawyers' Committee does not advise the Senate on all judicial appointments.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
The Lawyers' Committee gives a unanimous vote of "qualified" only to those candidates for judicial appointments who meet the committee's stringent standards for appropriate prior experience and ethical conduct.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
The Lawyers' Committee gives a unanimous vote of either "highly qualified" or "very highly qualified" to 95 percent of all candidates for judicial appointments.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Jones, like most lawyers, is a member of the professional organization that originally suggested the establishment of the Lawyers' Committee.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
答案:(D)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
问题: 下面那一个如果正确的话,最后理由驳斥参议员认为Jones非常有资格的宣称?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
读题: 参议员:Johes 非常有资格被任命为法官,证据是在律师委员会所使用的正式评分准则中,全体一致投票Johes 有资格。而该委员会在法官任命上为参议院提供建议.本题论据由as evidenced by 引导,论点为第一句话。因为unanimous vote of "qualified", 所以,highly qualified. cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
分析:(答案D)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
* 对于weaken来讲,cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1、选项中说到和论据、论点或两者之间的联系有不一样的就可作为答案cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
2、有其他原因影响论点也是weakencC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
(尽管unanimous vote of "qualified,但还有别的因素影响是否highly qualified) cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
C. 律师委员会仅仅对那些满足委员会严格要求的法官任命候选人,全体一致投票"有资格,C在加强论据,是支持。cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
D. 律师委员会对95%的候选人,全体一致投票或者"highly qualified",或者"qualified"。D中的95%恰恰说明Johes 只是许多人中的一个而已,在A-B之间进行了削弱,如果95%替换为5%,那就是support.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
E. 与qualify无关,不要进一步联想(他是最初建议律师委员会创建的组织成员之一, 所以律师委员会投以unanimous,所以反对了论据,这种推理是绝对要不得的).cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
On a tax form, a taxpayer is filling in numbers on eleven lines-F, G, H, I, K, L, M, Q, R, V,and Z-according to the following instructions and no others: cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Line F must be derived from lines G, H, and V as G plus H minus V.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Line L must be derived from lines I and K as I plus K.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Line Q must be derived from lines L and M as L minus M.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Line R must be derived from lines Q and F as Q minus F.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Line V must be derived from line L as five percent of L.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Line Z must be derived from line R as half of R.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
cannot be derived unless which of the following is known?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
FcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
GcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
HcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
IcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
McC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
答案:(D)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
读题:在一个税收报表中,一个纳税者在11行中填写数字(F,G,H,I,K,L,M,Q,R,V,Z)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
写条件:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
F=G+H-VcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
L=I+KcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Q=L-McC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
R=Q-FcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
V=5%LcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Z=1/2R cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
V不能得到,除非下面哪一个知道?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
解题步骤:(D)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1、看一下V是怎么得到的呢?当然要看等式左边,V等于什么, V=5%L, ∴V从L得到但是答案中并没有L,那么继续找L怎么得到呢?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
2、L=I+K, L从I、K得到,故D对。cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
cannot be derived unless which of the following is known?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
KcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
McC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
QcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
RcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
ZcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
答案:(A)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
读题:在一个税收报表中,一个纳税者在11行中填写数字(F,G,H,I,K,L,M,Q,R,V,Z)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
写条件:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
F=G+H-VcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
L=I+KcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Q=L-McC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
R=Q-FcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
V=5%LcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Z=1/2R cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
It is necessary for the taxpayer to know H before the taxpayer can derivecC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
LcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
McC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
QcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
RcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
VcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
答案:(D)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
读题:在一个税收报表中,一个纳税者在11行中填写数字(F,G,H,I,K,L,M,Q,R,V,Z)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
写条件:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
F=G+H-VcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
L=I+KcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Q=L-McC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
R=Q-FcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
V=5%LcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Z=1/2RcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
在得到什么之前,需要知道H?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
解题步骤:答案(D)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1、应该从等式右边找H;由F=G+H-V得,要想得到F,必须知道H,但是答案中并没有F,那么继续寻找在得到什么之前,需要知道FcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
2、在等式右边找F,R=Q-F,要想得到R,必须知道F, 故D对。cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
If the taxpayer knows I, H, K, and M but not G, which of the following is a pair of lines that the taxpayer can derive?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
F and VcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
L and QcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
L and RcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
R and VcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
R and ZcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
答案:(B)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
读题:在一个税收报表中,一个纳税者在11行中填写数字(F,G,H,I,K,L,M,Q,R,V,Z)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
写条件:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
F=G+H-VcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
L=I+KcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Q=L-McC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
R=Q-FcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
V=5%LcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Z=1/2RcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
At a conference, exactly seven speakers-Qualls, Ramirez, Smith, Titus, Umana,Vines, and Wertz-are to speak.In the schedule for the conference, there are seven time slots available for speakers, and the time slots are numbered consecutively 1 through 7. Exactly one speaker must be assigned to each time slot according to the following conditions: cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Qualls must speak immediately before or immediately after Titus speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Titus must speak sometime before Ramirez speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Smith must speak in either time slot 1 or time slot 7.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Vines must speak in time slot 4.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Which of the following must be true?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Qualls speaks sometime before Ramirez speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Qualls speaks sometime before Vines speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Smith speaks sometime before Titus speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Vines speaks sometime before Ramirez speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Wertz speaks sometime before Vines speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
答案:(A)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
读题:7个人Q,R,S,T,U,V,W在会议上作演讲,每人在一个time slot.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
写条件:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1、 (QT) (表示Q和T紧密相邻,并且不分前后)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
2、 T<R (表示T在R的前面)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
3、 S=1/7 (表示S在1或者7)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
4、 V= 4 (表示V在4) cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
条件总结:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
* 条件1和2联合:(QT)<RcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
* 注意: U, W没有任何限制,为等价元素。cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
If Ramirez speaks immediately before Vines speaks, which of the following could be true?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Qualls speaks in time slot 5.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Smith speaks in time slot 1.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Titus speaks in time slot 3.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Umana speaks in time slot 2.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Wertz speaks in time slot 6.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
答案:(E)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
读题:7个人Q,R,S,T,U,V,W在会议上作演讲,每人在一个time slot.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
写条件:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1、 (QT) (表示Q和T紧密相邻,并且不分前后)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
2、 T<R (表示T在R的前面)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
3、 S=1/7 (表示S在1或者7)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
4、 V= 4 (表示V在4) cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
条件总结:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
* 条件1和2联合:(QT)<RcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
* 注意: U, W没有任何限制,为等价元素。cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
如果 RV(表示R immediatelly before V), 下面那一个可能正确?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
解题步骤:答案(E)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1 2 3 4 5 6 7cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
(Q T) R V ScC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1、 由RV, V=4得, R=3cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
2、 解题方向到R,(QT)<R, ∴(QT)=1,2cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
3、 QT没有别的限制,元素和位置同等重要,位置1有限制,由S=1/7得S=7cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
4 U、W在(5,6)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
If Ramirez speaks sometime before Smith speaks, which of the following must be true?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Qualls speaks sometime before Umana speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Ramirez speaks sometime before Vines speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Titus speaks sometime before Vines speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Umana speaks sometime before Ramirez speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
Wertz speaks sometime before Qualls speaks.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
答案:(C)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
读题:7个人Q,R,S,T,U,V,W在会议上作演讲,每人在一个time slot.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
写条件:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1、 (QT) (表示Q和T紧密相邻,并且不分前后)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
2、 T<R (表示T在R的前面)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
3、 S=1/7 (表示S在1或者7)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
4、 V= 4 (表示V在4) cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
条件总结:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
* 条件1和2联合:(QT)<RcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
* 注意: U, W没有任何限制,为等价元素。cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
如果R<S,下面哪一个must be true ?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
解题步骤:答案(C) cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
4 5 6 7cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
V ScC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1、与R相关的条件(QT)<R, ∴(QT)<R<ScC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
2、与S相关的条件S=1/7, ∴S=7cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
3、从选项中得到,题目寻求元素的前后关系, 由步骤1和2, 以及V=4得,cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
QT<位置4cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
If Umana is to speak in time slot 2, there will be a total of how many scheduling possibilities from which to select the schedule of speakers?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
OnecC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
TwocC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
ThreecC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
FourcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
SixcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
答案:(B)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
读题:7个人Q,R,S,T,U,V,W在会议上作演讲,每人在一个time slot.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
写条件:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1、 (QT) (表示Q和T紧密相邻,并且不分前后)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
2、 T<R (表示T在R的前面)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
3、 S=1/7 (表示S在1或者7)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
4、 V= 4 (表示V在4) cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
条件总结:cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
* 条件1和2联合:(QT)<RcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
* 注意: U, W没有任何限制,为等价元素。cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
如果U=2,对于演讲者的选取共有几种选法?cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
解题步骤:答案(C)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1、条件中没有涉及U的条件,也没有位置2的条件, 先用固定条件。有V=4cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
1 2 3 4 5 6 7cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
S U V (Q T) RcC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
2、目前已经没有别的条件可用,但是我们发现7个位置,V在中间4,U=2,它使得cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
要有连续的话只能在567,由条件(QT)<R得,R=7, 再由S=1/7得, S=1 ,cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
∴一共有2种选法(QT)=56cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
(*连续条件的使用就必须要存在连续的位置,当题目中存在连续的条件,在解题时没有条件可用时,往往就需要用到这种固定的思维)cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8
.cC?5k}Ðöbforum.liuxuehome.comyÁSç0+8