急性子的用量()
A.3~9g
B.3~5g
C.0.1~0.3g
D.1~1.5g
E.3~10g
参考答案:B
They ______ an English evening next Sunday. [ ]
A. are having
B. are going to have
C. will having
D. is going to have
下列不属于普通快滤池组成部分的是()。
A.沉淀池
B.集水渠
C.洗沙排水槽
D.滤料层