补助饲喂蜜汁或糖水时，蜜或糖与水的比例是（）
Ａ5：1.
Ｂ６：１
Ｃ７：１
Ｄ８：１
参考答案：A
—What did our geography teacher say?
—She told us that the earth ___________ around the sun.
A. moves B. moved C. has moved
消防泵吸水的水温越高，其最大吸水高度（）。
A.越低
B.越高
C.没有影响
