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【判断题】
根据微生物的危害类型,对于中等以上甚至严重危害的微生物,样品采样使用二级采样方案;对健康危害低的,则建议使用三级采样方案。A.
正确
B.
错误
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皮皮学刷刷变学霸
举一反三
【单选题】________ such a difficult problem, he didn't know what to do. A.Faced B.Facing C.faced to D.Facing with
A.
Faced
B.
Facing
C.
Faced to
D.
Facing with
【简答题】SS3B型、SS4型机车上电机悬挂方式为 。
【单选题】______ with the hardship confronted with by the Red Army, the difficulty you're facing is insignificant.
A.
When compared
B.
Compare
C.
While comparing
D.
Comparing
【简答题】At present, a business model depending greatly on ads is facing challenge.
【简答题】Why do we need market investigations? Because sellers are facing ______ .
【简答题】In the meantime, the question facing business is whether such research is ________ the costs. A) worth B) worth of C) worthy D) worthwhile
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