建筑砂浆试验用料，应从同一盘砂浆或同一车砂浆中取样，取样量不应该少于试验所需量的（）倍.

A.2

B.3

C.4

D.5

I hear you got through your exam.Congratulations!（）

A.No. I didn't do well enough.

B.Who told you that?

C.Thanks.

D.Yes, I got a good mark.