肺心病死亡的首要原因是()
A.右心衰
B.肺性脑病
C.心律失常
D.休克
E.消化道出血
参考答案:B
前壁心肌梗死出现特征性心电图改变的导联是()
A.V1、V2、V3
B.Ⅱ、Ⅲ、aVF
C.V3、V4、V5
D.V5、V6
E.Ⅰ、aVL、V5、V6
—Did you give Tom a call?
—I didn’t need to , ________ I’ll see him soon.
A.when
B.though
C.until
D.because