缺铁性贫血()
A.红细胞中央淡染区扩大明显
B.NAP积分明显增高
C.骨髓红系细胞增生伴巨幼变
D.网织红细胞增高,>15%
E.骨髓穿刺常常"干抽"
参考答案:A
In a review of 44 studies, American researchers found that men and women who ate six key foods
daily cut the_____ of heart disease by 76% . [ ]
A. trouble
B. problem
C. risk
D. secret
()金属材料发生屈服时所对应的最小值称为。
A.弹性极限
B.屈服强度
C.抗拉强度
D.屈服极限