下列食物链正确的是( )
A:鹰→蛇→鸟→草
B:草→蚱蜢→食虫鸟→蛇→鹰
C:阳光→草→食草籽鸟→鹰
D:蘑菇→野兔→狐
下列关于我国的叙述中,正确的是( )
要使六边形木架不变形,至少要再钉上( )根木条.
Jack hurried to the rail way station in a taxi this morning ____ ____he wouldn't miss the train to Tianjin.