浆细胞瘤和B细胞杂交瘤生长因子是
A.IFN—α、TNF一α
B.TNF—α、IL—1
C.IL—2、IFN—γ
D.IL—6
E.IL—6、IL—1
参考答案:D
(2013·皖南八校一模)I felt surprised that anyone of his intelligence ________ such an easy test.
A.might have failed
B.could have failed
C.should have failed
D.must have failed
违反治安管理行为在12个月内公安机关没有发现的,不再处罚。( )