元素氧化物的顺序取决于元素与氧的结合能力，下面哪组氧化顺序对

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问题单项选择题

元素氧化物的顺序取决于元素与氧的结合能力，下面哪组氧化顺序对（）

A.SiMnAlpFe

B.AlSiMnpFe

C.SiMnAlFep

D.SiAlMnpFe

答案

参考答案：B

填空题

根据句意及汉语提示写单词。

1. Tom made an interesting _______ (演讲) last time.

2. Everyone should keep away from _______(毒品) as far as possible.

3.—How many students were _______(缺席的) from today’s English class?

—Only one.

4. Most of my classmates like learning _______(生物学).

5.—How many people were _______ (出席的) at the meeting?

—Two hundred.

判断题

装载放射性包装件，运输等级小的包装件应当摆放在运输等级大的包装件周围，装载作业时间允许超过规定的作业时间。