铁剂治疗缺铁性贫血,其疗效指标最早出现的是
A.血红蛋白上升B.红细胞数上升C.红细胞平均体积增大D.红细胞平均血红蛋白浓度上升E.网织红细胞数上升
参考答案:E
某商品原价每件a元,第一次降价是打“八折”,第一次降价后每件售价为( )元;为促销,商场决定每件再减10元,如果原价每件是200元,第二次降价后每件卖( )元。
I must find out why____so many students made the same mistake.
A.is it that
B.was it which
C.it is what
D.it was that