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

问题:

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 ______.

考点:欧姆定律及其应用
题型:填空题

约束带只能短期使用,一般定期松解时间是()。

A.每2小时松解一次

B.每4小时松解一次

C.每8小时松解一次

D.每12小时松解一次

E.每23小时松解一次

题型:填空题

采用额定剩余动作电流不超过( )的剩余电流保护器,被认为是其他防护措施失效时的附加防护。

A.20mA

B.30mA

C.40mA

D.50mA

题型:填空题

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

题型:填空题

下列哪一项不属于技能。()

A.走路

B.骑自行车

C.做梦

D.制定计划

题型:填空题

个人汽车消费贷款中,自用车、商用车、二手车贷款金额占所购汽车价格的比例上限分别是( )。

A.50%,70%,80%
B.50%,800k,70%
C.80%,50%,70%
D.80%,70%,50%

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