如果在密闭场所使用内燃机,工人应采取__________措施免受危害。

如果在密闭场所使用内燃机,工人应采取__________措施免受危害。

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沙盘推演测评法具有的特点是(  )。

沙盘推演测评法具有的特点是(  )。

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The researchers of the project have to be very careful with

The researchers of the project have to be very careful with every part if it____

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—__________do you think of this story?—It's very interesting

—__________do you think of this story?—It's very interesting.

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I don't think the film is worth__________.

I don't think the film is worth__________.

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