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问题 多项选择题

碱性镉镍蓄电池安装前检查内容包括( )。

A．电池槽表面无损坏、裂缝和变形

B．检查气塞橡胶套管的弹性

C．电池正、负柱应无松动

D．端柱接触面不应擦拭

E．注液孔上的自动阀或螺塞应完好，孔道应畅通无堵塞

答案

参考答案：A,B,C,E

选择题

毕升我国古代杰出的发明家，他的重大发明是  [ ]

A．指南针

B．雕版印刷术

C．活字印刷术

D．火药武器
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句型转换

句子转换。

1. She is an American, and he is English. (变成复数句子)

    ________________________________________________

2. Are the twins in different classes? (变成陈述句)

    ________________________________________________

3. They can see the blackboard and the door in the picture. (对划线部提问)

    ________________________________________________

4. Lucy and Lily are new students. (变成一般疑问句)

    ________________________________________________

5. —What are these? 

    —They are apples. (变成单数句子)

    ________________________________________________

6. My teacher is over there. (就划线部分提问)

    ________________________________________________
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