轮船行驶的路程÷时间=速度(一定),是比值一定,轮船行驶的路程和时间成正比例.
故选:A.
—Let’s ask him to _______ us in a game.
—Ok. Pass the coin from one of the students to _______.
A.join; another
B.join; the other
C.join in; another
D.join in; the other
在机场购买的免税品,能带上飞机吗?限制带多少?