紫外线常用于消毒（）
A.接种环
B.玻璃器皿
C.手术器械
D.实验室的空气
E.培养基
参考答案：D
Those citizens who love _________ nature told us that a lot of precious plants in Mount Jinyun stood in _______ danger.
A．a; a
B．the; the
C．/; the
D．/; /
简述汽车总布置草图三维坐标系的基准线及作用？
