石硫合剂主要有()、()和()三种物质熬制而成。
参考答案:生石灰、硫磺和水
Although I have traveled to many scenic spots before, ________of them are as attractive as the one
I visited this summer vacation.[ ]
A. any
B. none
C. neither
D. all
下面哪组数据是可以连续取值的计量数据()
A、重量、容积、长度
B、温度、产量、点数
C、长度、不合格品数、容积
D、缺陷数、重量、长度