—Why did you put these photos on your desk?—Because they can ______ me of my old classmates and friends.
A:remember
B:memorize
C:regard
D:remind
将体积为0.5dm3的球浸没在水中,球受到的浮力为____ N,此球排开的水重为____ N。
已知:如图,四边形ABCD和四边形AECF都是矩形,AE与BC交于点M,CF与AD交于点N.