氟试剂分光光度法测定水中氟化物，其测定范围在0.05－1900ml/l.

The trees _____ in the storm have been moved off the road.[ ]

A. being blown down

B. blown down

C. blowing down

D. to blow down

“（）”动作要求男女舞伴的脚在一条线上，髋部相对，身体向外侧打开。

慢性支气管炎对症治疗，有痰不易咳出时可用（）

A.右美沙芬、喷托维林（咳必清）或可待因

B.红霉素、罗红霉素

C.氯化铵合剂、溴己新

D.青霉素、阿莫西林

E.氧氟沙星、盐酸环丙沙星

—Your book, Tommy
—No, Mom, it's my friend's.
—Remember to return it to ______ name is on it.

A. what



B. which
C. whose



D. whosever

股票发行采用代销方式的，应当在发行公告中披露发行失败后的处理措施。( )