分解因式:x3﹣4x= _________ .

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问题:

分解因式:x3﹣4x= _________

考点:因式分解
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干燥机电流过高有几种原因?

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企业管理信息系统(MIS)的开发应具备一定的条件,下面所列的条件中最为关键的是

A.吸收MIS建设经验

B.选择系统开发方法

C.企业高层领导介入

D.确定系统开发策略

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单词拼写(共l0小题,计10分)

1. He has a_________ his dream of becoming the winner in this competition.

2. She took part in helping people in the Wenchuan Earthquake. She would never forget this unusual e        .

3. I like c______ with my friends online very much.

4. In Lily’s paper there are f_____ mistakes than  in Jack’s.

5.I read my essay a_________ in class and everyone can hear me clearly.

6. His speech was boring, but he did not r__________ it.

7. He is good at thinking. I think he can answer the question in a d__________ way.

8. Would you mind not w______ your time?

9. Don’t stay up late, or you will feel s___________ in class during the day.

10. He joined the army(军队) five years ago, so he has been a s___________ for five years.

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对于胸腔积液,下列说法错误的是()

A.积液量在300~500ml时可无临床症状

B.积液量小于500ml可有X线表现

C.CT检查对提示积液性质无效

D.B超是敏感性最高的检查胸腔积液的无创性诊断方法

E.X胸片可不表现为弧形向上的积液影

题型:填空题

自感电动势的方向可根据()判断。

A、欧姆定律

B、右手定则

C、左手定则

D、楞次定律

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