He bought a house,___________  the price is reasonable.

A．whose

B．its

C．of which

D．of whom

男，8岁。右足底被铁锈钉刺伤12天，出现张口困难，继之出现苦笑面容，角弓反张，声响及触碰病人可诱发上述症状，神志清楚，无发热。

这种菌感染发病率约占污染者的百分比(%)

A．0.1～0.2

B．0.3～0.4

C．0.5～0.6

D．1.0～2.0