An example illustrating whether there are limitations on consumer choice is that ______.
A.rights holders can at any time set pricing and access rights for their works.
B.people have to fly to a certain library to find a typical out-of-print book
C.other rights holders will be encouraged to conduct similar projects
D.google is working hard to improve bibliographic information
第2题
心脏骤停的病理,生理机制最常见的是
A.房性快速性心律失常
B.室性快速性心律失常
C.缓慢性心律失常
D.心室停顿
E.无脉性电活动
第5题
老年退行性心脏瓣膜病最常见的临床表现
A.心房纤颤
B.室性心律失常
C.肺水肿
D.栓塞
E.心力衰竭
第6题
致心脏骤停最常见的病理生理机制是
A.心室停顿
B.持续性室性心动过速
C.心脏电机械分离
D.心室纤颤
第7题
麻醉中可能发生的最严重的循环系统并发症是()
A.高血压
B.低血压
C.心脏停搏
D.心房纤颤
E.室性心律失常
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