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问题 填空题

方程3x-2a=1的解是x=-1，则a=     

答案

-2

把x=-1代入3x-2a=1得到关于a的方程-3-2a=1，然后解此一元一次方程即可．

解：把x=-1代入3x-2a=1得-3-2a=1，

解得a=-2．

故答案为-2．

选择题

给发育迟缓的小白鼠注射生长激素后，发育情况并没有改变，该小鼠体内发生病变的腺体和缺乏的激素是[ ]

A．垂体和生长激素

B．胰岛和胰岛素

C．甲状腺和甲状腺激素

D．肾上腺和肾上腺素
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句型转换

将下列句子变成反意疑问句。

1. She is a student,               ?    

2. Jack likes playing football,              ?

3. I’m late,                   ?

4. They planted trees last month,              ?

5. We have finished the work,              ?

6. Jim and Jack can swim,              ?

7. Flying kites is interesting ,              ?

8. There is a little milk in the bottle,                ?

9. Tom has to get up early,                  ?

10. Jenny won't go there tomorrow,              ?

11. He couldn't ride a bike at the age of 7,                 ?

12. We aren't going to do some shopping,             ?
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