设计底部的加强筋的高度应至少低于支撑面()。
参考答案:0.5mm
Some people haven’t realized something as common as _______to the sun for a long time will do harm to their skin and even cause skin cancer.
A.exposing
B.being exposed
C.having exposed
D.exposed
开具处方时,药品用法不得使用“遵医嘱”、“自用”等含糊不清字句,可用规范的下列哪种文字书写。()
A.英文
B.拉丁文
C.中文
D.以上都可以