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问题 问答题 简答题

简述LKJ的电源插件的主要性能参数。

答案

参考答案：

（1）除5V、±12V外所有输出回路彼此相互隔离。所有输出回路与输入回路隔离，隔离电压不小于1000VAC。

（2）输入回路具备过压抑制功能及过压/欠压保护

（3）输入欠压保护，可自恢复；

（4）输入过压保护，可自恢复；

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．By accident

B．In time

C．So far

D．Better still
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单项选择题

骨折的内因不包括：

A．年龄
B．全身健康状况
C．骨的解剖部位
D．骨的长度
E．骨骼健康状况
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