二尖辩区收缩期器质性杂音可见于下列哪种疾病
A．高血压性心脏病
B．贫血性心脏病
C．甲亢性心脏病
D．扩张型心肌病
E．二尖瓣脱垂综合征
参考答案：E
The astronaut did many experiments in the spaceship, ______ much help for knowing space.
A．which we think it is
B．which we think are of
C．of which we think are
D．I think which is of
1995年1月17日，日本坂神发生（）地震。
A.7.0级
B.7.2级
C.7.3级
D.7.6级
