跨经度最广的大洋是[ ]
A.太平洋
B.大西洋
D.印度洋
D.北冰洋
答案:D
_____ his ability of speech, he has made use of each chance.
A.To improve
B.Improving
C.Being improved
D.Improved
下列哪种疾病不引起血小板减少
A.肝硬化B.再生障碍性贫血C.DICD.急性白血病E.急性感染