GK阀局部减压量超过规定时，可在阀下体旁道孔上加装矽（）缩孔的

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问题单项选择题

GK阀局部减压量超过规定时，可在阀下体旁道孔上加装矽（）缩孔的铜片堵。

A.1.O～1.5mm

B.1.4～1.6mm

C.0.5～1.0mm

D.0.3～O.5mm

答案

参考答案：B

选择题

—I heard that Tom stole all the money from the old man.

—You’re joking! ________

A．I hope so.

B．I don’t agree.

C．I can’t believe it.

D．I don’t think so.

补全对话，情景问答

句子搭配。

( )1. Time for lunch.

( )2. Time for music.

( )3. Time for breakfast.

( )4. Time for P. E.

( )5. Time for English.

A. Have some chicken.

B. Have some bread and milk.

C. Sing and dance !

D. Read and write.

E. Jump and run.