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问题 选择题

由一种阳离子与两种酸根离子组成的盐称为混盐。混盐Na4S2O3，在酸性条件下可以产生S。下列关于混盐Na4S2O3的有关判断不正确的是[ ]

A．该混盐的水溶液呈碱性

B．该混盐溶液中加入BaCl2溶液，可以生成白色沉淀

C．该混盐与稀硫酸反应产生l mol S时转移2NA个电子

D．该混盐中的硫元素的化合价为-2和+4

答案

答案：C

填空题

根据句意首写字母填单词。

1. It's a ________ (秘密) between you and us. Don't tell anybody about it.

2. As students, it's our d________ to study hard at any subjects.

3. My grandfather died last month. His d________ made me very sad.

4. Bruce is old enough to look after h________ (他自己).

5. I don't know the right p________ of the word Jane

6. You should try your best if you want to ________ (实现) your dream.

7. If I had 5 million dollars, I would give it to medical ________ (研究).

8. Our teacher often tells us the ________ (重要性) of learning English.

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单项选择题

人员管理计划属于团队能力开发的( )。

A．依据

B．方法

C．成果

D．目的
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