功能安胎,用于胎动不安的药物有
A.白术、黄芩
B.杜仲
C.紫苏
D.菟丝子、桑寄生
E.香附、茯苓
参考答案:A,B,C,D
After the class,the students went out of the classroom one by one, but only Mary______.
A.left
B.hadleft
C.wasleaving
D.wasleft
滑环技术的主要功能是()
A.连续曝光
B.连续采集
C.单向连续旋转
D.床面连续移动
E.高压发生器连续旋转