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问题 单项选择题

下列不属于非血管内介入治疗技术的是（）

A.经皮穿刺胆道引流术

B.肝肾囊肿硬化治疗

C.经皮肾穿引流术及输尿管成形术

D.球囊血管成形术

E.取石术

答案

参考答案：D

选择题

The girl ______ in America for years． After graduation, she returned home, quite at a loss during her hunt for a job．

A．was studied

B．has been studied

C．studied

D．was studying
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单项选择题

一辆汽车刹车做匀减速直线运动，初速度大小为20m/s，加速度大小为5m/s²，则汽车在3s内和6s内的位移分别是多少？（）

A.37.5m；20m

B.37.5m；40m

C.30m；37.5m

D.40m；37.5m
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