词语接龙。
天空 空气 气体 ____ ____
—Why not stop ______ a rest?
—Oh, it's so exciting that I can't stop ______ the kite.
用字母表示(1)一个数加上m后得3,这个数是3-m(2)一个数减去x后得15,这个数是15-x(3)一个数乘以x得36,这个数是36x(4)一个数除以5得k,这个数是5k其中正确的有
下列实数中,是有理数的为( )
I'm hoping to take a____(a time of rest from work or school) in Europe at the end of this month.