血气分析标本使用的抗凝剂应为()
A.枸橼酸钠
B.肝素
C.氟化钠
D.草酸钠
E.EDTA-Na2
参考答案:B
I'm sure you'd rather she went to school by bus,______?
A.hadn't you
B.wouldn't you
C.aren't I
D.didn't she
为减少AT(自动变速器)在换档时的冲击,其液压系统蓄压器的活塞背面液压,通常采用()和()电磁阀进行调节控制。