下列哪项属闭合性损伤( )
A.裂伤B.割伤C.刺伤D.切伤E.挫伤
参考答案:E
The boats take different routes, but they all____ in the same place.
A.give up
B.clear up
C.end up
D.make up
在成熟B细胞转化成浆细胞过程不起作用的细胞因子是()
A.TNF
B.IL-2
C.11-4
D.IL-5
E.IL-6