划线时选择一个或几个平面(或线)作为划线的根据,划其他的尺寸线都从这里开始量起,这样的线或面就是()基准。
A、划线
B、设计
C、安装
D、测量
参考答案:A
活血行气、祛风止痛的药物是
A.川芎
B.丹参
C.桃仁
D.赤芍
E.乳香
It was not until dark _______ he found _______ he thought was the correct way to solve the problem.
A.that; what
B.that; that
C.when; what
D.when; that