IABP的主要血流动力学改变是（）
A.减少左室后负荷
B.提高收缩压
C.减少左室前负荷
D.增加冠状动脉灌流
E.减少右室后负荷
参考答案：D
Not only ______ interested in football but _____ beginning to show an interest in it.
[ ]
A.the teacher himself is; all his students are
B. is the teacher himself; all his students are
C. the teacher himself is; are all his students
D. is the teacher himself; are all his students
CD-ROM标准光盘允许写入数据（）。
A.1次
B.2次
C.3次
D.多次
