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问题 单项选择题

臭氧层位于地球表面大约

A．10～50km的平流层中
B．20～50km的平流层中
C．30～50km的平流层中
D．40～50km的平流层中
E．50km±5km的平流层中

答案

参考答案：C

解析：臭氧层位于地球表面30～50km的平流层中。

选择题

选出句子阅读停顿正确的一项[ ]

A．念／无与乐者，遂至／承天寺，寻张怀民。

B．怀民亦未寝，相与步／于中庭。

C．但少闲人如吾／两人者耳。

D．水中藻荇交横，盖／竹柏影也。

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填空题

用所给词的适当形式填空，使句子意思完整通顺。

1. Some _____(Italy) will visit their university next week.

2. Jenny is one of the most _____(success) students in her class.

3. Linda’s_______(perform) at the party was well received.

4. The old doctor uses sport as part of his patients’ _____(treat).

5. Frank was the first to run across the ______(finish) line at the sports meeting.

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