骨髓增生性疾病包括下列哪些疾病?()
A.真性红细胞增多症
B.原发性血板增多症
C.骨髓纤维化
D.骨髓增生异常综合征
E.CML
参考答案:A, B, C, E
多项式x2y3-3xy3-2的次数和项数分别是______.
His daughter was so ______ that she cried for hours when her pet cat died.A. senseless B. sensory C. sensibleD. sensitive