水套式加热炉配套的压力表精度等级不能低于()。
A.0.5级
B.1.0级
C.1.5级
D.2.0级
参考答案:C
When I told her that our journey would begin _____ an altitude of more than 5,000 metres, she seemed to be
excited about it. [ ]
A. at
B. in
C. on
D. off
肌节是指 。