A:甲烷
B:乙烷
C:乙烯
D:乙炔
—Yes, he was the first Chinese writer ________ won the prize for children's literature.
“黄梅时节家家雨,青草池塘处处蛙”形象的描绘了我国哪一个地区的景象( )
写出下图表示的数是 ____