盐酸和缓蚀剂的用量，一般取决于水垢的厚度和成分。
参考答案：对
黄曲霉的最适产毒温度是（）
A.12～18℃
B.20～24℃
C.25～33℃
D.35～38℃
E.40～45℃
-Which tie is more suitable for me, the red one or blue one?
-I have no idea. You'd better take them __________.[ ]
A. all
B. each
C. every
D. both
