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【单选题】
用直接滴定法测定阿司匹林原料药的含量,若供试品的称样量为W(g),氢氧化钠滴定液的浓度为C(mol/L),消耗氢氧化钠滴定液的体积为V(m1),每1ml的氢氧化钠滴定液 (0.1mol/L)相当于18.02mg的阿司匹林,则含量的计算公式为
A.
百分含量=
B.
百分含量=
C.
百分含量=
D.
百分含量=
E.
百分含量=
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参考答案:
举一反三
【单选题】What comments did the election officials make on the report?
A.
It is true.
B.
It is groundless.
C.
It is ridiculous.
D.
They made no comments at all.
【简答题】Work well with a multi-cultural and diverse work force.
【单选题】胃肠钡餐造影时,下列哪项不属于胃溃疡的特殊表现( )
A.
龛影深而大,深度与大小均超过1cm
B.
龛影周围有环堤征
C.
龛影很大,其中出现液面和分层现象
D.
龛影较大,口部常有一圈较宽的透明带,边界清楚而整齐
E.
龛影较大,达1.5~2.Ocm,深度不超过1.0cm
【单选题】What did Dar Pfeiffer report?
A.
That it plans to offer new services.
B.
That it had purchased a smaller firm.
C.
That it plans to increase its prices.
D.
That it had made more profit than expected.
【单选题】在多元文化社会,人们需要熟悉文化。In multi-cultural societies, people should _______.
A.
have knowledge about cultural
B.
be culturally competent
C.
be cultural knowledgeable
D.
be familiar with cultural
【简答题】滚子链是由滚子、 、销轴、 和 组成。
【多选题】滚子链由()、套筒和滚子组成。
A.
内链板
B.
外链板
C.
销轴
D.
转轴
【判断题】Managers ’ failure to regard cultural issues obviously will often create chaos in a multi-cultural company.
A.
正确
B.
错误
【判断题】单胃动物日粮中蛋白质品质的好坏直接影响动物体蛋白质品质。
A.
正确
B.
错误
【简答题】Work well with a multi-cultural and diverse work force.
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