大红细胞直径为
A.>7.2μm
B.>9μm
C.>10μm
D.>15μm
E.>20μm
参考答案:C
解析:小红细胞直径<6μm;大红细胞直径>10μm;巨红细胞直径>15μm。
I have _____ work to do every day. [ ]
A. too much
B. lot of
C. so many
D. a lot
怎样进行离子交换器中树脂的检查与验收?