如何停运低加水测?
参考答案:
1)检查汽侧停运、泄压;
2)开启低加旁路门;
3)关闭低加出入口门。
A person should stand on his own legs instead of _____others. [ ]
A. according to
B. depending on
C. going on
D. thinking of
普鲁烟酰胺作用机制是
A.抑制钠内流B.抑制钙内流C.促进钾内流D.阻断β-受体E.延长动作电位时间