问题 填空题 案例分析题

科学家通过对鼠和人控制抗体产生的基因进行拼接,实现了对鼠源杂交瘤抗体的改造,生产出对人体的不良反应减少、效果更好的鼠—人嵌合抗体,用于癌症治疗。下图表示形成鼠—人嵌合抗体的过程。请据图回答:

与植物原生质体的融合相比,动物细胞融合在诱导融合方法方面的主要区别是还常用()诱导融合。

答案

参考答案:灭活的病毒

单项选择题
阅读理解

阅读理解。

     One evening after dinner, Mr. and Mrs. William called a family meeting. "We've had to make a difficult

decision." Mr. William announced. "You see, your mother has been offered a post as co-director of a

television in Chicago. Unluckily, the station is not here. After thinking long and hard about it, we've concluded

(下结论) that the right decision is to move to Chicago."

     Peter looked shocked, while his sister Amy breathlessly started asking when they'd be moving:"It's

surprising, but exciting!" she said. Peter simply said, "We can't go-I can't leave all my friends. I'd rather stay

here and live with Tommy!"

     Mr. and Mrs. William hoped that by the time they moved in August, Peter would grow more accustomed

(习惯) to the idea of leaving. However, he showed no signs of accepting the news, refusing to pack his

belongings (物品).

     When the morning of the move arrived, Peter was nowhere to be found. His parents called Tommy's house,

but Tommy's mother said she hadn't seen Peter. Mrs. William became increasingly worried, while her husband

felt angry with their son for behaving so irresponsibly (不负责任).

     What they didn't know was that Peter had started walking over to Tommy's house, with a faint idea of

hiding in Tommy's attic (阁楼) for a few days. But something happened on the way as Peter walked past all

the familiar landscape of the neighborhood: the fence that he and his mother painted, the tree that he and his

sister used to climb, the park where he and his father often took evening walks together. How much would

these mean without his family, who make them special in the first place? Peter didn't take the time to answer

that question but instead hurried back to his house, wondering if there were any moving cartons (纸板箱) the

right size to hold his record collection.

1. The conflict (分歧) in this story was caused by _____.

A. Peter and Amy's different tempers (脾气)

B. a quarrel (争吵) between Tommy and Peter

C. Peter's disagreement with his parents about their move

D. Mr. and Mrs. William's words of Peter's irresponsibility

2. Peter and Amy were both _____ after hearing the move.

A. surprised

B. angry and worried

C. anxious for more details

D. worried about packing

3. The reason for Peter's going home was that _____.

A. he did not want to be left behind

B. he realized his family was essential (重要的) with him

C. he hoped to reach an agreement with his parents

D. He wished to be a more responsible person

4. What would more probably happen next?

A. Peter would bring his records over to the Tommy's house.

B. Mr. and Mrs. William would call the police.

C. Peter would join his family for house moving.

D. Mr. and Mrs. William would start searching for Peter.