蓝天上飘着白云，平静清澈的池塘中鱼在自由游动。人向池塘中看去

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问题选择题

蓝天上飘着白云，平静清澈的池塘中鱼在自由游动。人向池塘中看去，好像鱼在白云中游动。关于人观察到的鱼和白云，下列说法正确的是：[ ]

A. 鱼是实物，白云是光的反射形成的虚像

B. 鱼和白云都是光的反射形成的虚像

C. 鱼是实物，白云是光的折射形成的虚像

D. 鱼和白云分别是光的折射和反射形成的虚像

答案

填空题

用括号中所给单词的适当形式填空

1. People are not the only ones hurt by air __________(pollute).

2. The situation was much __________(bad) than they had expected.

3. Compared with the past, people today are __________(healthy) and live longer.

4. “What do you think is the most important __________(different) between the two words?”

the teacher asked.

5. As everyone knows, exercise can make us feel __________(relax).

填空题

流按照数据类型的不同，可以分为【12】和字符流。