肾结核术后需抗结核治疗的时间是（）
A.2周
B.1个月
C.2个月
D.3~6个月
E.7～12个月
参考答案：D
美国发动科索沃战争的目的是[ ]
A．维护 * *
B．支持科索沃独立
C．维护和平
D．加强控制巴尔干
Tom was so careless that he _____ his right arm when he was riding to school.
A．hurts
B．hurt
C．has hurt
D．had hurt
