如图所示,一木块在斜面上静止不动,请作出这个木块的受力示意图.
Come along now and sit down. Tom, can you make_____for Mary?
A.a face
B.room
C.some difference
D.space
室速伴严重血流动力学障碍时,终止发作的首选措施是:()
A.利多卡因
B.普鲁卡因酰胺
C.慢心律
D.电复律
E.胺碘酮