GTC型钢轨探伤车动车部分的定距为()。
A、7650mm
B、7750mm
C、7800mm
D、7850mm
参考答案:B
---Let’s go hiking __________ staying at home, shall we? --- A good idea.
A.as well as
B.in order to
C.instead of
D.because of
进行总钙和离子钙测定时,不能采用的标本为( )
A.自然排出尿液B.肝素抗凝血浆C.血清D.脑脊液E.EDTA抗凝血浆