下列哪项是引起便血的结肠疾病
A．肠伤寒
B．急性出血性坏死性肠炎
C．空肠憩室炎
D．阿米巴性痢疾
E．肠套叠
参考答案：D
Lang Ping , who used to be captain of Chinese Women's volleyball team, ______volleyball in China for
almost twenty years.[ ]
A. have played
B. played
C. was playing
D. had played
资源处于衰竭状态的重要野生药材物种是（）
A.黄芪
B.黄柏
C.黄芩
D.半夏
E.羚羊角
