不能判定四边形ABCD是平行四边形的是[ ]
A. AB=CD,AD=BC
B. AB=CD,AD//BC
C. AB//CD,AB=CD
D. AB//CD,AD//BC
答案:B
内浮顶罐被广泛用来储存()。
A.渣油
B.原油
C.润滑油
D.汽油
.The modern city was only a small fishing village compared to ____ it is now.
A which B that C what D where