风湿性心脏病二尖瓣关闭不全具有特殊意义X线征象()
A.左房压迫食管
B.肺淤血
C.左房有扩张性搏动
D.肺动脉段外凸
E.右室增大
参考答案:C
Maybe there are some things among the girl’s papers, like her school reports, old photos and so on. Can you _________ them and give me whatever you find?
A.go across
B.go over
C.go through
D.go with
定义是明确概念内涵的逻辑方法。