妊娠合并心脏病中常见的类型
A．先天性心脏病B．风湿性心脏病C．妊高征心脏病D．贫血性心脏病E．高血压心脏病
参考答案：B
We have made _____ a rule ______ in the office.
A．this, not to smoke
B．it, smoking
C．it, to not smoke
D．it, not to smoke
危害鲤、鲫鱼的鲤蠢绦虫的中间寄主是（）
A.鳔水蚤
B.剑水蚤
C.锚头蚤
D.颤蚓
