补充血容量是抗休克的根本措施，应首选
A．全血B．血浆C．等渗盐水或平衡盐溶液D．右旋醣酐E．10%葡萄糖液
参考答案：C
— What _____ do you like?
— I run every morning, and often play tennis at weekends. [ ]
A. sports
B. music
C. art
D. subjects
（11分）质量为m =" 1200" kg 的汽车,以速率v =" 6" m/s驶过半径为R =" " 40 m的凸形拱桥顶部时，桥顶部受到的压力大小是多少？当汽车的速率是多少时，凸形拱桥顶部恰好受到汽车的压力为零．
