肺结核大咯血最危险的合并症是
A．休克B．结核支气管播散C．肺不张D．窒息E．肺部感染
参考答案：D
— I am really worried about the test tomorrow.
— ________. You'll definitely pass it.[ ]
A. Don't mind
B. You should learn to be careful
C. Take it easy
D. Keep calm
轴承和轴封的严重磨损会使轴承箱的温度（）。
A.下降
B.上升
C.不变
D.无法判断
