根据题意得：x-4=0y-2=0，解得：x=4y=2，
则xy=8=22．
故答案是：22．
—It’s necessary and important ______school teachers to teach their students how to get on well with others.
—Yes, you said it.
A. of
B. for
C. from
D. to
根据下面中印两国领土重叠示意图估算，印度的面积大约是
A．5万平方千米
B．100万平方千米
C．300万平方千米
D．4000万平方千米
