大全-II-11,大全-II-13

11.    The cities with the densest population have the highest ratio of police officers to citizens. Such cities also have the lowest rates of property crime without contact between perpetrator and victim. Thus maintaining a high ratio of police officers to citizens can serve as an effective deterrent to at least certain kinds of property crime.

Which of the following, if true, most seriously weakens the argument above?

(A) The quality of training that police receive varies from city to city.

(B) High population density itself makes it difficult to commit a property crime that involves no contact between perpetrator and victim.

(C) Many nonviolent crimes in large cities are drug-related.

(D) A majority of the perpetrators of property crimes in densely populated cities are not apprehended by the police.

(E) Property crimes without contact between perpetrator and victim represent only a small proportion of overall crime.

答案是E,可以解释一下B和E的选项吗

13.    Of those person who became teachers in 1968 and who later left the profession, 30 percent today earn salaries above $35,000 a year: of those who became teachers in 1968 and have remained in the profession, only 15 percent today earn salaries above $35,000 a year. These figures indicate how underpaid teachers are today.

The argument above depends on which of the following assumptions about the persons for whom statistics are cited?

(A) At least one-third of the group of persons who have remained in teaching would today be earning more than $35,000 a year if they had left teaching.

(B) The group of persons who left teaching and the group who did not are comparable in terms of factors that determine how much people outside the teaching profession are paid.

(C) Most of those persons who left teaching did so entirely because of the low salaries teachers earn.

(D) As a group, those persons who have remained in teaching are abler and more dedicated than the group of persons who left teaching.

(E) The group of persons who left teaching and who today earn more than $35,000 a year were more capable teachers than the group who remained in the profession.

答案释B可以解释一下B,C,D,E这四个选项吗,各有什么错,和为什么要选B谢谢

11，我认为应该选B，你对答案确定吗？

13，原文部份说通过离开教师行业和留在教师行业的人的薪水对比，得出教书UNDERPAID，前提是原文统计数字里的人物具有代表性，能代表教师这个群体，所以B是对的。

11题答案是b,我选的是才是e,我一定昏头了,有几题答案都写错了,真是不好意思

我怎么觉得第二题应该选c

前提:30%的老师薪水3500 ; 现在只有15%的老师薪水有3500

结论:目前老师薪水下降

中间缺了个"桥"-数量和薪水的联系,所以只有c对啊,老师工资下降,老师离开!

不明白为什么选b??

我来试着解释一下.

11题:原文的逻辑是由于警察数量不够,所以造成了身体接触的犯罪,因此增加警察的数量可以防止类似现象的发生.问削弱:

找它因,否定原因,说由于城市本身人多，所以这一事实本身就不能减少身体接触的犯罪,因此警察再多也没有用了.

13题:对于类似的题目有个特点,即两组比较,前提一定是两组要一样,或者说可比,B就说两组可比.

C只是解释了老师当年为什么要走,是因为工资水平低,但无法得出今天老师的工资水平也低的结论,而原文的结论是说今天老师的工资水平低,所以无关,另外取非后,说老师当年走不是因为工资水平低并不影响今天老师工资水平低的结论,所以不是前提.

D说全部留下来的老师和走的老师比较能力更强,但是取非以后,结论依然成立,因为留下来的老师和走的老师水平一样,并不影响结论成立.

E是加强了结论,而不是前提.

前提只能是一个,就是可比,我的观点,请NN再解释一下吧.

(B) The group of persons who left teaching and the group who did not are comparable in terms of factors that determine how much people outside the teaching profession are paid.
B选项该怎么翻译呢, "outside the teaching profession" 只说了代表"非教师群体", "代表教师群体"是怎么理解出来的呢?

谢谢先..

再顶....