在血中停留3~6天后即转入组织,演变为巨噬细胞的是()
A.中性粒细胞
B.单核细胞
C.嗜酸性粒细胞
D.嗜碱性粒细胞
E.淋巴细胞
参考答案:B
Larry asks Bill and Peter to go on a picnic with him,but ________ of them wants to,because they have work to do.(2012·新课标全国)
A.either
B.any
C.neither
D.none
结合生殖Conjugation