下述主动脉瓣关闭不全的描述中，哪一项是错误的()
A．左心室肥大
B．右心室肥大扩张
C．心绞痛
D．水冲脉
E．主动脉瓣区吹风样收缩期杂音
参考答案：E
抛石挤淤施工时，当片石抛出水面()后，应在顶面铺一层较小石块，用重型振动压路机反复碾压。
A.0.3m
B.0.5m
C.0.8m
D.1.0m
He never ________ to help those in trouble because he was a kindhearted man. [ ]
A. handled
B. hurried
C. hesitated
D. determined
