⑴Welcome home!
⑵The earth goes around the sun.
⑶It was Daming's birthday yesterday.
⑷This is a book about food.
⑸I'm interested in space travel.
first:____ loudly:____ learn:____
national:____ go:____
下列各式计算正确的是( )
眼镜是人们常用的护眼工具,如图是一款变色眼镜的示意图:
北京到广州的直线距离是1800千米,在地图上两地距离是6厘米,此图的比例尺是( )