104型分配阀各阀盖组装时，须（）拧紧各螺栓。
A.顺时针
B.逆时针
C.均衡
D.没有特殊要求
参考答案：C
味咸微寒，可活血消癥，消肿排脓的药物是（）
A.乳香
B.五灵脂
C.丹参
D.穿山甲
E.斑蝥
This is my time to be here, I came in 2006 and 2009. I love the city very much.
A. first B. second C. third
