无人机着陆时,关于顺风着陆描述正确的是()
A.地速较大,平飘距离较长
B.地速较小,平飘距离较短
C.地速正常,平飘距离正常
参考答案:A
He once worked in a company, _____ he went abroad for further study.
A.from which
B.after that
C.after which
D.from this
作用强烈的泻下药一般不用于
A.脾胃虚弱
B.久病体弱
C.妇女胎前
D.妇女产后
E.月经期