测定润滑脂滴点有哪些注意事项?
参考答案:
(1)仪器规格和安装要符合要求;(2)要严格控制加热速度;(3)润滑脂中不能有气泡。
— I just can't stop worrying about the result of the job interview.
— ________. There’s nothing you can do now but wait. [ ]
A. Relax
B. Never mind
C. Go for it
D. Good luck
前列腺癌符合()
A.老年男性,排尿困难
B.血清PSA明显升高
C.两者都有
D.两者都无
E.可有任意一种