不锈钢阀门水压试验时，水中氯离子的质量分数不得超过（）x10—6_爱下问搜题

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问题单项选择题

不锈钢阀门水压试验时，水中氯离子的质量分数不得超过（）x10—6。

A.10

B.20

C.25

D.50

答案

参考答案：C

选择题

He said he ________ his teacher on his way home.

A. was seeing
B. were to see
C. was going to see
D. was going see

多项选择题

反映左心室肥大的体征有（）。

A.心尖区抬举性搏动

B.心尖搏动向左下移动

C.心界向左下扩大

D.负性心尖搏动

E.剑突下搏动