可传递抑制信号的是()
A.KIR2DL
B.NKp46
C.TCR
D.MBL
E.CEA
参考答案:A
—What does your brother do?
—He is ______. [ ]
A. a performer
B. fine
C. at school
D. twenty years old
Is this the watch you wish to _____?
A.have it repaired
B.repair it
C.have repaired it
D.have repaired