耙斗装岩机的机器磨损超过规定时,各部位会()
A.声音不正常
B.有强烈震动
C.正常
D.都没有
参考答案:A, B
下列哪项应诊断为2级高血压
A.140/85mmHg
B.160/90mmHg
C.140/110mmHg
D.190/115mmHg
E.115/80mmHg
John didn't go to bed ____ deep night.[ ]
A. at
B. in
C. till
D. until