下列溶液蒸干后,能析出溶质固体的是 [ ]
①FeCl3 ②Fe2(SO4)3 ③Ca(HCO3)2 ④Na2CO3
A.仅①④
B.仅②④
C.仅①②
D.全部
答案:B
英文缩写“iv.gtt”的中文含义是( )
A.静滴
B.静注
C.肌内注射
D.注射剂
E.滴剂
The teacher told us ______ the story carefully.
A. read B. to read C. reading