问题
选择题
178. There are four basic _____ of blood in the human body. What do you belong to, A, B, AB or O?
A．kinds
B．sorts
C．types
D．Classes
答案
C
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178. There are four basic _____ of blood in the human body. What do you belong to, A, B, AB or O?
A．kinds
B．sorts
C．types
D．Classes
C