问题
单项选择题
爆破地点附近()以内风流中瓦斯浓度达到1%,严禁装药、爆破。
A.10m
B.15m
C.20m
D.25m
答案
参考答案:C
爆破地点附近()以内风流中瓦斯浓度达到1%,严禁装药、爆破。
A.10m
B.15m
C.20m
D.25m
参考答案:C
阅读下面短文,掌握大意,然后请从A、B、C、D四个选项中选出最佳选项。 When are you an adult? When do you think you are an adult? Maybe different have different ideas. Now let's see what some American teenagers say. Sam: In idea, you are an adult at the of 18. That's when you can vote(投票). You can help to who rules the whole country. That's also a grown-up does! My grandfather couldn't vote he was 21. They changed it to 18 in 1971. Jenny: I don't it's hard to say. I can drive a car at 16, can't I? When you have a driver's license, you can it to people to tell them your age for all kinds of things. sixteen must be the age when you change from a person to an adult. Because you can tell others you are not a any more. Suzie: Well, I think there is wrong with American laws for when young people can things. I can vote at 18 and drive at 16. So you would think that 18 is a grown-up, 16 isn't. But then I can't drink wine until I'm 21! If I'm an adult at 18, how can people stop me from a cup of beer in a bar?
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