The children _________ the park tomorrow.[ ]
A. went
B. are going to
C. go
D. goes
答案:B
一个广场长是60米,宽45米,扩建后长增加15米,宽增加8米,扩建后广场面积增加了多少?
与人畜共患传染病有关的病毒是
A.中和抗体B.NK细胞C.补体结合抗体D.CTLE.干扰素