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问题
填空题
吴国的建立可追溯到______(朝代)太伯、仲雍南下。
答案
参考答案:
商代末年
选择题
— Sorry. I am late.
— It doesn't matter. The meeting _____ for just several minutes
A. has begun
B. has started
C. has been on
D. had been on
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单项选择题
硝酸甘油不具有下列哪种作用( )
A.扩张容量血管
B.减少回心血量
C.增加心率
D.增加心室壁张力
E.降低心肌耗氧量
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