施工现场职工膳食、饮水、休息场所应当符合（）标准。
参考答案：卫生
如图，△ABC中，边AB、BC的垂直平分线交于点P，探究：点P是否也在边AC的垂直平分线上．
Many people say that they are annoyed by the U.S. News pictures.
A.Right
B.Wrong
C.Not mentioned
