高压差、大排量试油导致油气层损害的因素是（）。
A.储层内微粒运移
B.井眼周围形成压力亏欠带
C.产生压实作用
D.上述三项
参考答案：D
.
It is in Qingdao ______ you are going to pay a visit to ______ this kind of washing machine is produced.
A．/; that
B．where; which
C．/; where
D．what; which
电影中频繁出现的吸烟镜头称为（）争相追崇的时尚。
A.年轻人
B.影迷
C.观众
D.学生
