皮皮学，免费搜题
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【单选题】
用盐酸标准溶液(0.1000mol/L)滴定碳酸钠式样，称取式样0.1986g，滴定消耗37.31ml标准溶液。 有关反应式：2HCl+Na 2 CO 3 =2NaCl+2CO 2 +H 2 O 求碳酸钠的含量 计算公式是： 公式中的 为：A.
0.1000/mol/L
B.
106.0g/mol
C.
0.1986g
D.
37.31ml
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举一反三
【单选题】Conversation two 10
A.
He is hard-working and learns fast.
B.
He is good at calculation.
C.
He has some work experience in the field of finance.
D.
He is patient with people.
【单选题】Conversation Two 10
A.
The tickets are too expensive.
B.
The stage is too far away.
C.
It is too noisy.
D.
There are always too many people.
【单选题】Conversation Two 10
A.
They distract children.
B.
They cost a lot.
C.
They are indispensable.
D.
They are dangerous
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