在工件进行测量前，无需对工件去毛头，清洗，直接测量即可。（）
参考答案：错
寒邪的性质和致病特点是()
A.易伤阳气
B.重浊，黏滞
C.易于伤肺
D.病难速愈
E.以上均非
Do you know where Ottawa is?
Sorry, _____. [ ]
A. it's easy
B. I know about Ottawa
C. that's great
D. I don't know
