减水剂
参考答案：
是指掺入砼拌合物中后，在保持砼拌合物流动性一定的情况下，能够减少用水量的外加剂。
2log525+3log264=______.
— ____________ day is it today?
— It's Tuesday.
A. What's
B. What
C. Which
D. Which's
