树突状细胞的表面分子
A．CD3 B．CDl9 C．KIR D．MHC-Ⅱ E．IL-2
参考答案：D
It is so cold in the room. Would you mind me _____ the door? [ ]
A. close
B. to close
C. closing
D. closed
青丸子2功效与作用
