血沉升高见于以下疾病,除了
A.多发性骨髓瘤
B.妊娠期
C.SLE
D.真性红细胞增多症
E.严重贫血
参考答案:D
When we hurried to the station, there happened ____ no bus at that time. [ ]
A. to have
B. to be
C. having
D. being
我国三角皮带型号为七种型号,其中()型三角皮带截面积最小。