以上心室率可快可慢可规则也可不规则的是()。
A.心房扑动
B.房颤
C.阵发性室上性心动过速
D.阵发性室性心动过速
E.窦性心动过缓
参考答案:A
My brother is having fun ______ model planes. He has made many model planes. [ ]
A. make
B. making
C. makes
D. to make
在AutoCAD中打开或者关闭对象捕捉的功能键为()
A.F3
B.F8
C.F9
D.F11