A:海陆热力性质的差异
B:高低纬度之间受热均匀
C:地转偏向力
D:气压带和风带的季节移动
I watched them ________ basketball just now.
We find _______ necessary to give children time and freedom to relax.
如果m÷n=2(n不为0),那么m和n的公因数有2。(判断对错)