红细胞比容是指红细胞()
A、与血浆容积之比
B、与白细胞容积之比
C、在血液中所占的容积百分比
D、在血液中所占的重量百分比
参考答案:C
Dictionaries are important to us students. When we meet a new word, we can _____ in them.[ ]
A. look it up
B. look up it
C. look for it
D. look them up