维持呼吸功能正常的重要环节是
A．肺主肃降的生理功能
B．宗气的生理功能
C．肝主疏泄的生理功能
D．肾主闭藏的生理功能
参考答案：A,B,D
He spent __________ money on books and _________ his books are about space and satellites.
A．a great deal of; a good many of
B．a good many; a great number of
C．a great number of; a large amount of
D．quantities of; a quantity of
测血压时，输气球打气至肱动脉音消失时，此时袖带内压力是（）
A.小于心脏收缩压
B.等于心脏收缩压
C.大于心脏收缩压
D.等于心脏舒张压
