造成我国冬季南北温差大的最主要因素是（ ）
1 morning, everyone. 2 Grace. Look (看).This is a 3 .It’s a nice quilt. What 4 is it? 5 yellow and white. And 6 this in English？It’s 7 .It’s 8 jacket. That’s a ruler. 9 ruler is 10 .
