提出“大陆漂移假说”的科学家是( )
A:哥伦布
B:魏格纳
C:牛顿
D:哥白尼
如图,在平行四边形ABCD中,过点C的直线CE⊥AB,垂足为E,若∠EAD=54°,则∠BCE的度数为( )
— Why are you in such a hurry?
—I am dying to see my brother. He is coming back home tonight.
中国近代第一份商业性报纸是( )