A:甲烷
B:乙烷
C:乙醇
D:乙二醇
—What do you think of the song Little Apple ________ was sung by Chopsticks Brothers?
—It's relaxing and easy to sing.
为了分割地方知州的权力,宋太祖设置的官职是( )
如图,正方形OABC与正方形ODEF是位似图形,O为位似中心,相似比为1:2,点A的坐标为(1,0),则E点的坐标为( )