问题
选择题
水是宝贵的自然资源．下列说法正确的是（ ）
A．水在自然界中不断循环，取之不尽、用之不竭
B．水是常见的溶剂，广泛用于工农业生产
C．为了节约用水，可以用工业废水直接浇灌农田
D．自来水中只含水分子，不含其它粒子
答案
答案：B
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水是宝贵的自然资源．下列说法正确的是（ ）
A．水在自然界中不断循环，取之不尽、用之不竭
B．水是常见的溶剂，广泛用于工农业生产
C．为了节约用水，可以用工业废水直接浇灌农田
D．自来水中只含水分子，不含其它粒子
答案：B
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| Lucy: Hi, Mary Nice to meet you! I have some questions to ask you! Can you help me? Mary: OK, I'd like to. Tell me! Lucy: I get up early every morning and I eat in school. Can I eat in our classroom? Mary: No, you can't. But you can eat in the cafeteria. Lucy: I know. And can I wear a hat when I am in the classroom? Mary: No, you can't. And you must wear your uniform at school. Lucy: And what are the other rules in school? Can you tell me? Mary: You can't listen to music in the classroom, but you can listen to it in the music room. Lucy: I know. Anything else? Mary: And you can't arrive late for class, you must be on time. That's all. Lucy: Thank you very much. Mary: You're welcome. Bye-bye. Lucy: Bye-bye ! | |||||||||||||||
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