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【单选题】
若以无水碳酸钠为基准物标定盐酸溶液时,( )应用操作液淋液三次左右。A.
滴定管
B.
容量瓶
C.
锥形瓶
D.
量筒
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反馈参考答案：
举一反三
【简答题】《生产性粉尘作业危害程度分级》不适用于（ ）。
【单选题】If we don't take action on this issue within the next five years, we won't have anything to do ______ to campaign about.
A.
in ten years' time
B.
in twelve years' time
C.
in twenty years' time
【单选题】If we place a stone on a scale that calibrates to measure weight, then the reading on the scale is the stone’s weight. If we do this underwater, the apparent weight of the stone in a fluid
A.
is smaller than its weight.
B.
is equal to its weight.
C.
is bigger than its weight.
【简答题】股份有限公司的设立可以采取的方式有（ ）。
【单选题】If we want to finish this job on time, we must keep our eyes on the bal l.
A.
do a good job
B.
focus on the ball
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