2009版保养制度规定,一级保养底盘中心作业内容包括()。
A、清洁
B、检查
C、紧固
D、润滑
参考答案:A, B, C, D
She wanted to make herself _____, but she failed. Others still didn't understand her. [ ]
A. to understand
B. understood
C. understanding
D. understands
在免疫应答过程中,巨噬细胞
A.产生抗体
B.表达TCR
C.产生细胞因子
D.表达CD8分子
E.发生基因重排