题目

SOUTHPORT, ENGLAND—A British teaching union famous for strange ideas has supported a proposal to employ dogs as classroom assistants. At the annual conference of the Professional Association of teachers in Southport, northwest of England, one person suggested properly trained dogs be able to keep order in primary schools. They can round up lost children and protect those who experience unfortunate “accidents”. Wendy Dyble, a Shetland Islands woman who teaches children up to age seven, made it clear to her fellow friends that she was not “barking mad”. They obviously believed her, sup“生物导弹”是指  A.效应T细胞     B.杂交瘤细胞     C.带有特定药物的单克隆抗体     D.单克隆抗体