补阳还五汤的功用是A.破血下瘀B.活血祛瘀,行气止痛C.补气活血通络D.活血祛瘀,疏 发布时间:2017-12-16 02:56 │ 来源:www.tikuol.com 题型:单项选择题 问题: 补阳还五汤的功用是A.破血下瘀B.活血祛瘀,行气止痛C.补气活血通络D.活血祛瘀,疏肝通络E.温经散寒,祛瘀养血
题型:单项选择题 已知氢气和碳燃烧的热化学方程式为: ①2H2(g)+O2(g)==2H2O(l);△H1=-akJ·mol-1②H2(g)+1/2O2(g)==H2O(g);△H2=-bkJ·mol-1③C(s)+1/2O2(g)==CO(g);△H3=-ckJ·mol-1④C(s)+O2(g)==CO2(g);△H4=-dkJ·mol-1 且abcd均大于零,下列说法正确的是 [ ]A.氢气的燃烧热为bkJ·mol-1 B.碳的燃烧热为ckJ·mol-1C.一氧化碳的燃烧热为(c-d)kJ·mol-1D.1/2a>b 查看答案