A:契丹族
B:匈奴族
C:鲜卑族
D:党项族
阅读:当a、b均为正数时,若a<b,则有a2<b2,反之也成立.
活动:现已知x2=7,请你设计一个方案来确定x的近似值(精确到小数点后两位).
The boy is young carry the bag of rice.
____+____=____
选择正确的搭配
①What can you do?____ I like jelly.
②What do you need?____ I can fly a kite.
③What do you like? ____ I need a blouse.
④What do you see?____ I hear a pig.
⑤What do you hear? ____ I see a sheep.