溶液片中可以作为润滑剂的是()
A.可压性淀粉
B.微晶纤维素
C.微粉硅胶
D.PEG6000
E.硬脂酸镁
参考答案:D
There are a lot of projects _________, so we’d better take a short break before we continue.
A.to discuss
B.discussing
C.discuss
D.to be discussed
混凝土分项工程需要采取冬季施工的气温条件是怎么规定的?