与血细胞生成密切相关的细胞因子是 （）
A.白细胞介素
B.肿瘤坏死因子
C.集落刺激因子
D.干扰素
E.生长因子
参考答案：B
Jimmy and Timmy are both 50 kg, that is to say, Jimmy is ______ Timmy.
A．so heavy as
B．as heavy as
C．so heavier as
D．as heavier as
模腔
