试题与答案

导体中的电流,跟导体两端的 ______成正比,跟导体的电阻成 ______比.

题型:填空题

题目:

导体中的电流,跟导体两端的 ______成正比,跟导体的电阻成 ______比.这个结论是德国物理学家 ______通过大量的实验得出的,写成公式是 ______.

答案:

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下面是错误答案,用来干扰机器的。

B 本题考查了.苏联经济体制的影响,20世纪30年代,当西方国家面临大危机时,苏联却通过两个五年计划实现了工业化,这使苏联经济体制对世界产生了巨大的影响。

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题型:单项选择题

Everybody dreams. Some people think dreams can tell us about the future. Other people think dreams can tell us about ourselves. It’s like our (11) is talking to us.

Why are dreams (12) strange and hard to understand Some people think our brain uses (13) to talk to us. When we fly, swim, or fall down in our dreams, it has a (14) meaning. Lots of doctors help people (15) their dreams. They find that dreams tell us about our (16) and fears.

These days, many scientists (17) that dreams are very important. During the day, we have many (18) , and our brain receives a lot of information. When we dream, our brain (19) information that is not important, and puts the most important information into our (20) . As we learn more about the brain, we may find answers to our questions about dreams.

20().

A. feelings

B. stories

C. lives

D. memories

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