2. Consumer income reports produced by the govern- ment distinguish between households and families by means of the following definition: "A family is a household containing a householder and at least one person related to the householder." Except for the homeless and people in group living quarters, most people live in households.
According to the definition above, which of the following must be true? (A) All householders are members of families. (B) All families include a householder. (C) All of the people related to a householder form a family. (D) Some people residing in group living quarters are members of families. (E) Some homeless people reside in group living quarters.
答案:B,我选A,A为什么不对呢?请问做这种题有什么好的思路吗?
如果B:Each family includes a householder.那就是答案,可是B说的是all,是不是英文中的意思是完全一样的呢?
16. In a study of the effect of color on productivity, 50 of 100 factory workers were moved from their drab workroom to a brightly colored workroom. Both these workers and the 50 who remained in the drab workroom increased their productivity, proba- bly as a result of the interest taken by researchers in the work of both groups during the study.
Which of the following, if true, would cast most doubt upon the author's interpretation of the study results given above?
(A) The 50 workers moved to the brightly colored room performed precisely the same manufac- turing task as the workers who remained in the drab workroom. (B) The drab workroom was designed to provide adequate space for at most 65 workers. (C) The 50 workers who moved to the brightly colored workroom were matched as closely as possible in age and level of training to the 50 workers who remained in the drab work-room. (D) Nearly all the workers in both groups had volunteered to move to the brightly colored workroom. (E) Many of the workers who moved to the brightly colored workroom reported that they liked the drab workroom as well as or better than they liked the brightly colored workroom.
1.A错是因为超出了范围, family范围大于the household with a householder, family至少2人，householder+1,关键是读懂描述的关系。 2.B削弱是给出他因，指出100人在原来容纳65人的空间工作，效率自然就低，分出50人后，两边的人因空间大效率提高了。
a household with the householder only a family with a householder and someone else 这两个并不相等，前者the householder只能说是the member of a household, 不能是the member of a family
1. B 原文指出family(A)是有一个householder并加上至少一个与其有亲属关系的人(B). 由此可以推断出a. 如果只有一个householder, 那就不是family. 逻辑关系为A--B ==> 非B-->非A. 所以选项A错. 原逻辑关系中有两个必要条件: B1. householder B2. at least one person related to the householder. 所以 A--> B1 and B2. 因此B选项正确.
2. weaken题目很典型的一种是"其它原因造成". 此题中, 原文逻辑为: premises: increased productivity in both the 50 workers in brightly colored room and the 50 workers remaining in the drab colored room, compared to 100 workers in the drab... conclusion: brightly color help improve productivity
还要注意原文指出两批50个工人的productivity都提高. 如果没有此条件, 或条件为50 workers in brightly-colored showed improved productivity when compared to 50 workers in the drab .. 则不能推出B.
2。the interest taken by researchers in the work of both groups during the study. ===>Both these workers and the 50 who remained in the drab workroom increased their productivity， 对吗？ 而不是brightly color help improve productivity，对吗？
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发表于 2003-4-25 11:21:00
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