推动人体生长发育及脏腑机能活动的气是（）
A.元气
B.宗气
C.营气
D.卫气
E.动气
参考答案：C
—What do you think of the two backpacks?
—______ of them are very nice. [ ]
A. Either
B. Both
C. Each
D. All
使黔首自实田
