做好营业员个人卫生,尤其注意()。
A.口腔卫生
B.手指卫生
C.脸部卫生
D.头发卫生
参考答案:B
The news ______is spreading around the airport is ______ a heavy storm is coming.
A.what; /
B.that; that
C./; that
D.that; which
试计算下图中水泵装置的总扬程。(已知:∑hS=1m,∑hd=9m)