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问题 单项选择题

在出现"共同延误"的情况下，承担拖期责任的是（ 　）。

A．造成拖期最长者

B．最先发生者

C．最后发生者

D．按划成拖期的长短，在各共同延误者之问分担

答案

参考答案：B

选择题

下列涉及有机物的性质的说法错误的是

A．苯不能使KMnO4溶液褪色，甲苯使KMnO4溶液褪色

B．将铜丝在酒精灯上加热后，立即伸入无水乙醇中，铜丝变成黑色

C．黄酒中某些微生物使乙醇氧化为乙酸，于是酒就变酸了

D．HNO3能与苯、甲苯、甘油、纤维素等有机物发生重要反应，常用浓硫酸作催化剂
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单项选择题

Research on animal intelligence always makes me wonder just how smart humans are. (91) the fruitfly experiments described in Carl Zimmer’s piece in the Science Times on Tuesday. Fruit flies who were taught to be smarter than the average fruit fly (92) to live shorter lives. This suggests that (93) bulbs burn longer, that there is an (94) in not being too terrifically bright.
Intelligence, it (95) , is a high-priced option. It takes more upkeep, burns more fuel and is slow (96) the starting line because it depends on learning—a gradual (97) —instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to (98) .
Is there an adaptive value to (99) intelligence That’s the question behind this new research. I like it. Instead of casting a wistful glance (100) at all the species we’ve left in the dust I.Q. wise, it implicitly asks what the real (101) of our own intelligence might be. This is (102) the mind of every animal I’ve ever met.
Research on animal intelligence also makes me wonder what experiments animals would (103) on humans if they had the chance. Every cat with an owner, (104) , is running a small-scale study in operant conditioning, we believe that (105) animals ran the labs, they would test us to (106) the limits of our patience, our faithfulness, our memory for terrain. They would try to decide what intelligence in humans is really (107) , not merely how much of it there is. (108) , they would hope to study a (109) question. Are humans actually aware of the world they live in (110) the results are inconclusive.

A．invisible

B．limited

C．indefinite

D．different
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