出血性疾病
A．咯血颜色鲜红B．铁锈色血痰C．砖红色胶冻样粘痰D．粉红色乳样痰E．粉红色浆液性泡沫样痰
参考答案：A
I don't think it's good to copy others' homework. You should ____________it. [ ]
A. get over
B. get on
C. get up
D. get off
按照轴的分类方法，自行车的中轴属于（）
A.传动轴
B.固定心轴
C.转动心轴
D.转轴
