普萘洛尔、硝酸甘油、硝苯地平治疗心绞痛的共同作用是
A. 减慢心率
B. 缩小心室容积
C. 扩张冠脉
D. 降低心肌耗氧量
E. 抑制心肌收缩能力
六大基本茶类的分类依据是什么?What is the classification basis of six tea varieties?
A. 茶叶色泽colors
B. 制作工艺manufacturing
C. 茶叶品种varieties
D. 茶叶名称tea names
绿茶属于( )茶Green tea belongs to ( ) tea
A. 不发酵Non-fermented
B. 半发酵Semi-fermented
C. 微发酵Slightly-fermented
D. 全发酵Fully-fermented
炒青绿茶出现在下面哪个朝代Which dynasty did fried-fixation green tea appear in?
A. 唐Tang
B. 宋Song
C. 元Yuan
D. 明Ming