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【单选题】
室性阵发性心动过速的特点是A.
多不影响功能
B.
按压颈动脉终止发作
C.
多无器质性心脏病
D.
心电图无室性融合波
E.
心尖区第一心音强弱不等
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【简答题】常见的网络服务有()()()()()
【单选题】Recognized as ________ world cultural heritage by the United Nations in 2002, paper cutting is ________ practice which originated in ancient China.
A.
the; a
B.
a; a
C.
the; the
D.
a; the
【单选题】Dr. Swanson has written articles about interstellar travel.
A.
underwater
B.
long-distance
C.
high-speed
D.
outer space
【单选题】What does the author think interstellar travel can do?
A.
It practically enables human to escape the end of the world.
B.
It simply postpones the process of human extinction.
C.
It helps human avoid the fate of being vaporized or frozen.
D.
It is a way to help human escape from death by gravity.
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