外周血中全血细胞减少,Ham试验阴性()
A.阵发性睡眠性血红蛋白尿
B.缺铁性贫血
C.再生障碍性贫血
D.巨幼细胞贫血
E.自身免疫性溶血性贫血
参考答案:C
The father is creative enough_________ so many nice toys for his daughter.
A.buying
B.making
C.to buy
D.to make
采用沙石料导渗时,应严格按()分层铺设,并尽量减少在已铺反滤料上践踏。
A.粗细
B.厚薄
C.面积大小
D.反滤质量要求