诊断冠心病最有价值的介入性检查是()
A.冠状动脉造影
B.心脏电生理检查
C.心内膜心肌活组织检查
D.心腔内心音图检查
E.心腔内心电图检查
参考答案:A
Jack, are you leaving now? It's 7:20.()
A.Yes, it‘s still early.
B.No, thirty minutes is enough
C.Yes, the bag is not ready.
D.No, I‘ll set off in 30 minutes.
中国有哪些保存完好的宫殿建筑?为什么其他宫殿没有保存下来?