试题与答案

铝在空气中会迅速的跟氧结合,在表面形成一层坚韧的氧化铝薄膜。这层膜不但能防止铝的内层

题型:单项选择题

题目:

铝在空气中会迅速的跟氧结合,在表面形成一层坚韧的氧化铝薄膜。这层膜不但能防止铝的内层继续与氧结合,起到保护作用,而且对许多腐蚀性介质除了()以外均具有较强的抵抗能力。

A.质量分数为98%的浓硝酸

B.碳酸氢铵

C.氨水

D.甲醛

答案:

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1. Today is _____.

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B. Saturday

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D. Monday

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C. go to the park

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C. see a film

D. watch a basketball match

4. I like playing _____.

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D. table tennis

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C. don't do my homework

D. read books

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