问题
单项选择题
科学家用小鼠骨髓瘤细胞与B淋巴细胞融合，得到杂交细胞，经培养可产生大量的单克隆抗体，所用的B淋巴细胞是来自（）
A.骨髓的B淋巴细胞
B.脾脏的能产生抗体的B淋巴细胞
C.胸腺的B淋巴细胞
D.脾脏经过筛选的，能产生单一抗体的B淋巴细胞
答案
参考答案：D
搜题请搜索小程序“爱下问搜题”
科学家用小鼠骨髓瘤细胞与B淋巴细胞融合，得到杂交细胞，经培养可产生大量的单克隆抗体，所用的B淋巴细胞是来自（）
A.骨髓的B淋巴细胞
B.脾脏的能产生抗体的B淋巴细胞
C.胸腺的B淋巴细胞
D.脾脏经过筛选的，能产生单一抗体的B淋巴细胞
参考答案：D
| 阅读理解。 A Day in a Class "Good morning, class, "Mr Cruz says. He points (揩向) to the board. "These are what we will do today."
A. 9:00 am B. 10:00 am C. 11:00 am 2. This story happens (发生) on _____. A. Monday B. Tuesday C. Wednesday 3. The students have _____ classes in the morning. A. three B. four C. five 4. This story is mostly about _____. A. who will teach the students B. why the students go to school C. what the class will do 5. The students will _____ at 12:00. A. have science B. read books C. have lunch |