— Why didn't you buy the book?

— I _____, but I didn't have the money. [ ]

A. would have

B. bought

C. would like to

D. had bought

早期脑梗死的脑血管造影的主要征象为()

A．动脉排空延迟

B．循环时间延长

C．动静脉短路

D．血管闭塞

E．动脉血流缓慢