绘图题：请画出常通二位两通阀的符号。_爱下问搜题

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问题问答题简答题

绘图题：请画出常通二位两通阀的符号。

答案

参考答案：

选择题

With Xu Ming's help, Zhang Lin does his homework ____ than before.

A. more careful
B. more carefully
C. much careful
D. much carefully

填空题

氯化胺尿素水溶液固化剂，要求比例是氯化胺：尿素：水=（）。