— you sing?
— No, but I can dance.[ ]
A. Are
B. Is
C. Can
答案:C
参与淋巴细胞归巢的粘附分子是()
A.CD44
B.VLA-4
C.LFA-1
D.CLA
E.L-选择素
变压器常用的冷却方式有哪些?