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问题 单项选择题

某校和某工厂之间有一条公路，该校下午2时派车去该厂接某劳模来校作报告，往返需用1小时。这位劳模在下午1时便离厂步行向学校走来，途中遇到接他的汽车，便立刻上车驶向学校，在下午2时40分到达。问：汽车速度是劳模步行速度的几倍

A．10
B．8
C．9
D．6

答案

参考答案：B

解析： 汽车走单程需要60÷2=30分钟，实际走了40÷2=20分钟的路程，说明相遇时间是2时20分。相遇时，劳模走了60+20=80分钟，这段距离汽车要走30-20=10分钟，所以车速，劳模速度=80:10=8。所以应选B。

选择题

下列不属于社会主义改造对象的是   [ ]

A．农业             

B．手工业  

C．资本主义工商业  

D．外国资本主义企业
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单项选择题

Research on animal intelligence always makes us wonder just how smart humans are. (1) the fruit-fly experiments described by Carl Zimmer in the Science Times. Fruit flies who were taught to be smarter than the average fruit fly (2) to live shorter lives. This suggests that (3) bulbs burn longer, that there is a(n) (4) in not being too bright.

Intelligence, it (5) , is a high-priced option. It takes more upkeep, burns more fuel and is slow (6) the starting line because it depends on learning — a(n) (7) process — instead of instinct. Plenty of other species are able to learn, and one of the things they’ve apparently learned is when to (8) .

Is there an adaptive value to (9) intelligence That’s the question behind this new research. Instead of casting a wistful glance (10) at all the species we’ve left in the dust I.Q.-wise, it implicitly asks what the real (11) of our own intelligence might be. This is (12) the mind of every animal we’ve ever met.

Research on animal intelligence also makes us wonder what experiments animals would (13) on humans if they had the chance. Every cat with an owner, (14) , is running a small-scale study in operant conditioning. We believe that (15) animals ran the labs, they would test us to (16) the limits of our patience, our faithfulness, our memory for locations. They would try to decide what intelligence in humans is really (17) , not merely how much of it there is. (18) , they would hope to study a(n) (19) question: Are humans actually aware of the world they live in (20) the results are inconclusive.

11（）

A.features

B.influences

C.results

D.costs
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