公差带一端是开口的,另一端由()限定。
A.偏差
B.基本偏差
C.标准公差
参考答案:C
女,25岁。面黄、乏力、尿色深30天。Hb100g/L,MCV90fl。血清结合珠蛋白减低,血浆高铁血红素清蛋白阳性。
最可能的病因是()。
A.急性白血病
B.缺铁性贫血
C.溶血性贫血
D.巨幼细胞贫血
E.再生障碍性贫血
There are _____ people here in the city. But only _____ people of them are Chinese. [ ]
A. million of; two millions
B. millions of; two million
C. millions of; two millions
D. million of; two million