对于某种或某类危险物质规定的数量,若单元中的物质数量等于或超过该数量,则该单元定为重大危险源的标准是(  )。

对于某种或某类危险物质规定的数量,若单元中的物质数量等于或超过该数量,则该单元定为重大危险源的标准是(  )。

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下列不属于生物性危险和有害物质的是(  )。

下列不属于生物性危险和有害物质的是(  )。

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The money most American firms put in training mainly goes to

The money most American firms put in training mainly goes to

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How should a person rest during an illness?He should rest bo

How should a person rest during an illness?He should rest both his body and_____

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(  )应当根据办理完毕的收付款凭证,隧时逐笔顺序进行登记,最少每天登记一次。

(  )应当根据办理完毕的收付款凭证,隧时逐笔顺序进行登记,最少每天登记一次。

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