下列哪一种心律失常听诊时心律可正常()
A.阵发性室性心动过速
B.窦性心动过速
C.阵发性室上性心动过速
D.心房扑动伴4:1房室传导
E.以上都不是
参考答案:D
The situation is more _________ than ever. I’m _______about what to do next.
A.puzzled; puzzled
B.puzzling; puzzling
C.puzzling; puzzled
D.puzzled; puzzling
土壤污染