题目
Green Trees Gym(体育馆) Swimming Mon. ~ Sun. 8:00 a.m. ~ 8:00 p.m. Basketball Sat. ~ Sun. 8:00 a.m. ~ 6:00 p.m. Volleyball Mon. ~ Sat. 10:00 a.m. ~ 6:00 p.m. Aerobics(健身操) Mon. ~ Sun. 6:00 a.m. ~ 9:00 p.m. Tel: 6227225 E-mail: greentrees@yahoo.com Red Apples Gym Swimming Mon. ~ Fri. 6:00 a.m. ~ 6:00 p.m. Basketball Mon. ~ Sun. 8:00 a.m. ~ 6:00 p.m. Volleyball Mon. ~ Sun. 8:00 a.m. ~ 6:00 p.m. Aerobics Mon. ~ Sun. 下图是单克隆抗体制备流程的简明示意图。下列有关叙述,正确的是( )A.①是先利用特定的抗原蛋白饲喂小鼠,再从小鼠脾脏中分离出B淋巴细胞B.②中为避免病毒感染,需用聚乙二醇诱导骨髓瘤细胞和B淋巴细胞融合C.细胞融合得到的③中只有杂交瘤细胞一种细胞D.④是经抗体检测和克隆化培养获得的能分泌特异性抗体的杂交瘤细胞群