问题
单项选择题
气体压缩爆炸造成的破坏效应主要表现为空气中形成的（）冲击波。
A、压缩
B、爆炸
C、膨胀
答案
参考答案：B
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气体压缩爆炸造成的破坏效应主要表现为空气中形成的（）冲击波。
A、压缩
B、爆炸
C、膨胀
参考答案：B
| Fill in the blanks. Complete the dialogue. 补全对话。 |
| A: 1 ! Do you have an umbrella? B: Yes! I'll show you. 2 ? A: I like this one, but it's fifty dollars. 3 ? B: It's thirty-five dollars. A: OK. I want that one. 4 . B: 5 ! A: Bye! | A. Do you like this one or that one B. Good-bye C. Here is the money D. Excuse me E. How much is that one |