标题: lsat 16 (2.2) questions [打印本页] 作者: 1stzhang 时间: 2003-5-28 23:41 标题: lsat 16 (2.2) questions [face=Georgia]18. In experiments in which certain kinds of bacteria were placed in a generous supply of nutrients, the populations of bacteria grew rapidly, and genetic mutations occurred at random in the populations. These experiments show that all genetic mutation is random.
Which one of the following, if true, enables the conclusion to be properly drawn?
(A) Either all genetic mutations are random or none are random.
(B) The bacteria tested in the experiments were of extremely common forms.
(C) If all genetic mutations in bacteria are random, then all genetic mutations in every other life form arc random also.
(D) The kind of environment in which genetic mutation takes place has no effect on the way genetic mutation occurs.
(E) The nutrients used were the same as those that nourish the bacteria in nature.
答案是A,这是怎么从原文得到的。
19. Thomas: The club president had no right to disallow Jeffrey's vote. Club rules say that only members in good standing may vote. You've admitted that club rules also say that all members whose dues are fully paid are members in good standing. And since, as the records indicate, Jeffrey has always paid his dues on time, clearly the president acted in violation of club rules.
Althea: By that reasoning my two-year-old niece can legally vote in next month's national election since she is a citizen of this country, and only citizens can legally vote in national elections.
The reasoning in Thomas' argument is flawed because his argument
(A) fails to take into account the distinction between something not being prohibited and its being authorized
(B) offers evidence that casts doubt on the character of the club president and thereby ignores the question of voting eligibility
(C) wrongly assumes that if a statement is not actually denied by someone, that statement must be regarded as true
(D) does not specify the issue with respect to which the disputed vote was cast
(E) overlooks the possibility that Althea is not an authority on the club's rules
这个A答案是如何反映原文的逻辑错误的，原文的逻辑错误具体表现在什么地方？
26. When the manufacturers in a given country are slower to adopt new technologies than their foreign competitors are, their production costs will fall more slowly than their foreign competitors' costs will. But if manufacturers' production costs fall less rapidly than their foreign competitors' costs do, those manufacturers will be unable to lower their prices as rapidly as their foreign competitors can; and when a country's manufacturers cannot lower their-prices as rapidly as their foreign competitors can, that country gets squeezed out of the global market.
If the statements above are true, which one of the following must also be true on the basis of them?
(A) If the manufacturers in one country raise their prices, it is because they have squeezed their foreign competitors out of the global market.
(B) If manufacturers in one country have been squeezed out of the global market, this shows that their foreign competitors have adopted new technologies more rapidly than they have.
(C) If a country's foreign competitors can lower their production costs more rapidly than the country's own manufacturers can, then their foreign competitors must have adopted new manufacturing techniques.
(D) If a country's manufacturers adopt new technologies at the same rate as their foreign competitors, neither group will be able to squeeze the other out of the global market.
(E) If a country's manufacturers can lower their prices as rapidly as their foreign competitors can, this shows that they adopt new technology at least as fast as their foreign competitors do.
这个题目的确是把我比来比去就给搞晕了！答案是E[/face]作者: albert 时间: 2003-5-29 00:54
18 原文有个GAP： certain kinds of bacteria RANDOM ---> all genetic mutation is random. 特殊例子推出一般结论 B 如果真，可以让这成立。。B的意思是要么所有的都不是RANDOM，要么都是RANDOM的。
1。 fail to adapt new...than ...---> cost fall more slow than ... 2. cost less rapidly than...---> unalbe to low price as quickly as... 3. unalbe to low price as quick as ...--> get out