自动化仪表工程的高压管道上开孔时,应采用(  )的方法。

自动化仪表工程的高压管道上开孔时,应采用(  )的方法。A.气割加工 B.机械加工 C.电弧加工 D.凿子加工

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She's extremely competent and industrious.

She's extremely competent and industrious.A.hardworking B.honest C.objective D.i

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What can be learned from the passage about giving birth to

What can be learned from the passage about giving birth to baby sea horses?A.It

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Several countries in the world are using strong electromagne

Several countries in the world are using strong electromagnets __________.A.to

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