滑坡上的岩,土体在重力作用下沿坡内一个或几个滑动面作整体下滑的过程叫做()
A.崩塌
B.滑坡
C.溜坍
D.坍方
参考答案:B
— When did you lose your passport, sir?
— It was yesterday evening ______ I was walking down the street.[ ]
A. when
B. that
C. which
D. on which
口服维生素D治疗活动期佝偻病何时改为预防量口服()
A.半年后改预防量
B.5个月后改预防量
C.3个月后改预防量
D.2个月后改预防量
E.1个月后改预防量