如果改变(),将会使以前的数据丢失(无法显示)。
参考答案:时间间隔
A small plane crashed into a hillside five miles east of the city, _________ all the four people on board.
A.killed
B.killing
C.having killed
D.to kill
M受体阻断药不包括
A.后马托品
B.山莨菪碱
C.东莨菪碱
D.筒箭毒碱
E.哌仑西平