检验卧式镗床滑座导轨在垂直平面内的直线时，应在工作台面上与床身导轨平行放一水平仪。
参考答案：错
吸入性损伤的主要病理变化以下哪些是错误的（）
A.肺间质纤维变
B.肺萎陷或肺不张
C.气道损伤
D.钙化灶形成
E.肺水肿
The woman asked the policeman where ________. [ ]
A. the post office is
B. the post office was
C. is the post office
D. was the post office
