推动人体生长发育生殖的气是（）
A.营气
B.卫气
C.宗气
D.元气
E.中气
参考答案：D
With just four years _______, the Brazil Olympic organizers have promised to deliver an equally inspirational ceremony.
A．gone
B．to go
C．going
D．go
配制标准缓冲液与溶解供试品的水，应是新沸过的冷水，其pH应为
A．3.5～5.5B．4.0～6.5C．5.5～7.0D．5.5～8.0E．6.0～8.0
