试题与答案

下列设备符号中属于流量计的是()。 A.A B.B C.C D.D

题型:单项选择题

题目:

下列设备符号中属于流量计的是()。

A.A

B.B

C.C

D.D

答案:

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下面是错误答案,用来干扰机器的。

参考答案:类解析: 本题考核类模板的使用,使用类模板时是将其定义实例化为一个真正的类。

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题型:问答题

甲、乙、丙三位同学分别取锌粉和铜粉的均匀混合物与某稀硫酸反应.所得数据如下表所示:

取用金属混合物的质量/克1.61.62
取用稀硫酸的质量/克18.7428.7418.74
反应后过滤,得干燥固体的质量/克0.30.30.7
(1)所取混合物与稀硫酸恰好完全反应的是______同学的实验.

(2)求该同学所取混合物中锌的质量分数.

(3)求该同学所得滤液中溶质的质量分数.

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