—Nowadays WeChat is very popular among friends. —Yes. It seems to be the best way of communication _____ people like.
A:that
B:which
C:who
南亚和西亚一直是世界热点地区,读西亚和南亚局部地区图,回答下题.
江苏省的面积约为102 600km2,这个数据用科学记数法可表示为____ km2.
先化简,再求值: x2−2x+1x2+x ÷(1﹣ 2x+1 ),其中x= 3 .