三钠一胶综合防垢剂常由哪几种药剂组成?
参考答案:
三钠一胶综合防垢剂是由碳酸钠、磷酸三钠、氢氧化钠和栲胶等四种药剂组成。
That sweater looks _______ nice. [ ]
A. real
B. really
C. very much
D. too much
明代白话短篇小说反映了哪些时代内容?试举例分析。