试题与答案

压敏电阻的阻值会随所受压力的增大而减小,某同学利用压敏电阻设计了判断电梯运动状态

题型:不定项选择

题目:

压敏电阻的阻值会随所受压力的增大而减小,某同学利用压敏电阻设计了判断电梯运动状态的装置,其装置示意图如图所示,将压敏电阻平放在电梯内,受压面朝上,在上面放一物体m,电梯静止时电流表示数为I0,电梯在不同的运动过程中,电流表的示数分别如图甲、乙、丙、丁所示,下列判断中正确的是

[ ]

A.甲图表示电梯可能做匀速直线运动

B.乙图表示电梯可能做匀加速上升直线运动

C.丙图表示电梯可能做匀加速上升直线运动

D.丁图表示电梯可能做匀减速下降直线运动

答案:

AC

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题型:阅读理解

A dog has a horse. The horse was beautiful and also it had many good qualities.   61    It especially wanted to become the most beautiful horse in the world.

One day the horse said to the god, “You have given me beauty. You have given me other good qualities.62    But how I wish you could make me more beautiful! I would be extremely, extremely grateful if you could make me more beautiful.”

The god said, “I’m more than ready to make you more beautiful.  63  ” Then the horse said, “My neck is too short .If you can make neck a little longer, my upper body will be more beautiful. And if you can make my legs much longer and thinner, then I will look more beautiful in my lower body.”

Then immediately the god made a camel appear in place of the horse. The horse was so sad that it started to cry, “Oh, no, I do not want to become a camel.   64 As a horse, everybody appreciated my good qualities. Nobody will appreciate me as a c I’m more than ready to amel.”

The god said, “This is exactly  what you asked for. You have become a camel.

65   if you cry for a longer neck and legs, this is what will happen. Each thing in my creation has its own good qualities. The camel is not as beautiful as you are, but it carries heavy loads and has a great sense of duty.”

A.I’m so grateful to you.

B.Why not remain a horse?

C.I wish you to change me into a horse again.

D.Tell me in what way you want to be changed.E.     But it wanted to be more perfect in every way.

F.      Never try to receive more than I have given you

G.    I am glad to know that you feel good with yourself now

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