以下受体一协同刺激分子的结合哪项错误()
A.CD28与CD80
B.CD40L与CD40
C.CD2与LFA-3
D.CD4-MHCⅡ
E.CD8-MHCⅡ
参考答案:E
Last year the number of death increased 2%-5% the year before last. [ ]
A. to; comparing to
B. to; comparing with
C. by; to compare with
D. by; compared with
下面Java语言标识符正确的是( )。
A.7SA
B.info$2001
C.%mail
D.class