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【判断题】
、镁、锰标准使用液配制后，贮存于聚乙烯瓶内,4℃保存。所用玻璃仪器均以硫酸-重铬酸钾洗液浸泡数小时，再以洗衣粉充分洗刷，后用水反复冲洗，最后用去离子水冲洗烘干，使用。A.
正确
B.
错误
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A.
main bearings
B.
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C.
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D.
lower temperature fresh water
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