问题
单项选择题
从根本上解决毒物危害的首选办法是（）。
A、通风
B、密闭毒源
C、采用无毒低毒物质代替高、剧毒物质
答案
参考答案：C
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从根本上解决毒物危害的首选办法是（）。
A、通风
B、密闭毒源
C、采用无毒低毒物质代替高、剧毒物质
参考答案：C
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| Do you think of your parents? "Yes, of course." you may answer, "I buy a present for my mother on 1 . And I give my father a present on Father's Day, too." Then what about the other days of a year? Always 2 to think of your parents, not just on some 3 days. I have a friend. She 4 alone, because her parents live in another city. One day I went to see her. We had a nice talk. Then she wanted to make a telephone call. She dialed (拨) the number, but then she put the phone 5 . After about ten seconds, she dialed the number again."Hi, Mom …" Later, I asked,"Why did you dial the number 6 ?" She smiled,"My parents are old. They can't get 7 the telephone quickly. I always do so when I call them. I just want to give them 8 time to answer the call." My friend is a good girl. She is always 9 her parents, so why not 10 her? You'll also be a good child. | ||||
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