题目

A number of animals killed and the number of them getting smaller and smaller.A. has been; are B. has been; is C. have been; is D. have been; are 答案：【答案】C【解析】句意：许多的动物被杀死，它们的数量变得越来越小。根据a number of“许多……；大量……”，作主语时谓语动词用复数；the number of“……的数量”，作主语时谓语动词用单数。故选C已知矩形ABCD，若它的宽扩大2倍，则它的面积等于原面积的 ；若宽不变长缩小14倍，那么新矩形的面积等于原矩形面积的 ；若宽扩大2倍且长缩小14，那么新矩形的面积等于原矩形面积的 ．