什么是未遂质量事故？
参考答案：
出厂水泥自检或经复验富余强度不足，属未遂质量事故。
—What do you think of that tea set as a gift for Mary’s birthday?
— .
A．My pleasure
B．I think it’s a Chinese style
C．Not bad
D．Let me think it over
能用于预防麻疹的药物是( )
A．紫草
B．升麻
C．白鲜皮
D．葛根
E．荆芥
