问题
单项选择题
当出站压力()导阀设定压力时,则井口安全系统将动作。
A、高于
B、等于
C、低于
D、波动
答案
参考答案:C
当出站压力()导阀设定压力时,则井口安全系统将动作。
A、高于
B、等于
C、低于
D、波动
参考答案:C
A:Welcome to our restaurant. B:Thank you. 1 A:OK. Here it is.(A few minutes later) 2 B:I’d like a beef hamburger and salad. A: 3 B:Fruit salad.And some drinks,please.What drinks do you have? A:We have orange juice,coffee and tea. 4 B:What is it? A:It is hot milk with sugar and chocolate.It tastes good. B:Well,I’ll have a try. A:OK.Wait a minute,please. (20 minutes later) B: 5 A:Let me see.It’s 35 yuan. B:All right.Here’s the money.
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