在不同个体之间进行心功能比较时宜选用的评定指标是
A.搏出量B.心输出量C.射血分数D.静息心指数
参考答案:D
In the rush hour, hiring ________ taxi for you to do what you are eager to do may be ________ better
choice in our city. [ ]
A. the; the
B. a; the
C. a; a
D. /; a
维生素D的良好来源是()
A.猪肉
B.水果
C.海水鱼、肝脏、蛋黄和鱼肝油
D.人奶和牛奶
E.绿色蔬菜