急性风湿热不伴有心脏炎的患儿，阿司匹林治疗的总疗程为
A．1～3周
B．3～6周
C．6～12周
D．半年
E．1年
参考答案：B
—English is______ too difficult for me. I can't learn it well.
—Don't give up. Nothing is difficult if you work hard. [ ]
A. seldom
B. usually
C. never
D. always
恒星周日视运动
