实验室里加热约2mL液体,应使用的仪器是( )
A.②、③、⑤
B.①、③、④、⑥
C.②、③、⑤、⑥
D.①、③、④、⑤
答案:A
—I can't move the bookcase. Could you give me a hand?
—________.[ ]
A. With pleasure
B. It's my pleasure
C. Not at all
D. Never mind
钻孔注水的钻孔直径为()mm之间。
A、42~56
B、28~46
C、36~48
D、42~52