A:a和b
B:b和a
C:b和c
D:c和b
若要制备杂交瘤细胞,需取免疫后小鼠的B淋巴细胞(染色体数目40条),并将该细胞与体外培养的小鼠骨髓瘤细胞(染色体数目60条)按一定比例加入试管中,再加入诱导剂诱导细胞融合,经筛选培养及抗体检测,得到不断分泌抗A抗体的杂交瘤细胞.
回答下列问题:
用所给词的适当形式填空 1. She wants ____(read) a book.2. Her keys ____ (be) on the dresser.3. Are ____(that) oranges?4. Jim and Tom ____ (have ) a basketball.5. He has four ____(watch).6. Please take the books to ____ (they).7. Jim____(not play) sports every day.8. ____ (thank) for your help.9. This book is very ____(interest).10. My father ____ (need) a new bike.