Those poor and needy teenagers were excited to find a shop at the corner where they could buy ____ priced bikes.

A．competitively

B．recently

C．reasonably

D．affordably

流行性出血热早期休克的主要原因是（）

A.小血管通透性增加，血浆外渗，血容量锐减

B.播散性血管内凝血

C.心肌损害

D.肾功能不全，水、电解质平衡失调

E.肠道大出血或继发感染