[讨论][求助]几道og逻辑老题求教!

fernandochang

[求助][讨论]几道逻辑真题求教!
都是过去的老题请教!!   求教思路!!!    谢谢!

LUXIN CRITICAL REASONING LOOSE-LEAFING

23. A ten-year comparison between the US and the Soviet Union in terms of crop yields per acre revealed that when only planted acreage is compared, Soviet yields are equal to 68 percent of US yields. When total agricultural acreage (planted acreage plus fallow acreage) is compared, however, Soviet yield is 114 percent of US yield.

From the information above, which of the following can be most reliably inferred about US and Soviet, agriculture during the ten-year period?

(A)A higher percentage of total agricultural acreage was fallow in the US than in the Soviet Union.
(B)The US had more fallow acreage than planted acreage.
(C)Fewer total acres if agricultural land were fallow in the Soviet Union than in the US.
(D)The Soviet Union had more planted acreage than fallow acreage.
(E)The Soviet Union produced a greater volume crops than the US produced.
A):A         

31.Less than 50 percent of a certain tropical country’s wildlands remains intact. Efforts are under way to restore biological diversity in that country by restoring some destroyed wild habits and extending some relatively intact portions of forests. However, opponents argue that these efforts are not needed because there is still plenty of wildland left.

Which of the following, if true, most significantly weakens the argument of the opponents of conservation efforts?
(A)As much, if not more, effort is required to restore a wild habitat as to preserve an intact habitat.
(B)The opponents of restoration efforts are, for the most part, members of the wealthier classes in their own villages and cities.
(C)Existing conservation laws have been very effective in preserving biological diversity within the wildlands that remain intact.
(D)For many tropical species native to that country, the tropical wildlands that are still relatively intact do not provide appropriate habitats for reproduction.
(E)If a suitable population of plants and animals is introduced and is permitted to disperse and grow, tropical habitats can most certainly be restored.
A)      

32.Every discovery in modern physics has been stated in terms of sophisticated mathematical concepts. But such concepts are simply devices created by the human mind to manipulate experience; they cannot duplicate reality. Thus, modern physics is merely an ingenious set of fictions, and as such it cannot provide an insight into the way the world works.

Which of the following is the strongest argument against the position taken in the passage above?

(A)There is no reason to state that the human mind should not attempt to manipulate experience.
(B)There is no reason to state that fictions cannot provide in sight into reality.
(C)The same dependence on mathematics is found in biochemistry as in physics.
(D)Ancient physics did not employ sophisticated mathematics.
(E)Mathematics is not supposed to duplicate reality but should be pursued for its own sake.
A):B