若曲线y=x2+ax+b和2y=-1+xy3在点(1,-1)处相切,其中a,b是常数,则______.
A. a=0,b=-2
B. a=1,b=-3
C. a=-3,b=1
D. a=-1,b=-1
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关于利多卡因药理作用的描述,下述哪一项是错误的
A. 明显阻滞钠通道
B. 促进钾外流
C. 缩短复极过程
D. 缩短浦肯野纤维及心室肌的APD和ERP,且缩短APD更为显著
E. 降低浦肯野纤维的自律性
How does the man feel about the woman's decision
A. Patient.
B. Surprised.
C. Worried.
D. Irritate
硝酸酯类抗心绞痛作用机制不包括
A. 扩张全身容量血管
B. 扩张心脏输送血管
C. 冠脉血流重新分配
D. 降低心肌耗氧量
E. 促进氧与血红蛋白分离
Though ______ in a big city, he had always preferred to record the plain facts of small-town life.
A. raised
B. grown
C. cultivated
D. developed