不宜用于变异型心绞痛的药物是()
A.硝酸甘油
B.普萘洛尔
C.地尔硫革
D.硝苯地平
E.维拉帕米
参考答案:B
When he realized the audience’s attention was beginning to ___, he raised his voice.
A.wander
B.exist
C.starve
D.celebrate
当压力低至()PSI时,低油压开关动作,压缩机自动停车
A、80
B、50
C、30
D、25