Section A
Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the conversation and the questions will be spoken only once. After each question there will be a pause. During the pause, you must read the four choices marked A, B, C and D, and decide which is the best answer.
听力原文:W: Can you recommend some universities with good graduate schools?
M: Well, generally in the US each university has its own special fields in which it is particularly outstanding. A large university is not necessarily good in every field.
Q: What does the man mean?
(12)
A.It's not easy to recommend her a university.
B.A large good university is good in every field.
C.Some universities have their own special fields.
D.It's not good to go to only one university.
第1题
细胞的长期保存,一般采用何种方法
A、肉汤冻存
B、甘油-20℃保存
C、DMSO液氮保存
D、DMSO-20℃保存
E、冻干保存
第2题
细胞的长期保存,一般采用
A、肉汤冻存
B、甘油-20℃保存
C、二甲亚砜液氮保存
D、二甲亚砜-20℃保存
E、冻干保存
第3题
杂交瘤细胞株的保存方法是()。
A、室温保存
B、4℃冰箱保存
C、-20℃冻存
D、-70℃冻存
E、液氮冻存(-190℃)
第4题
在体外长期保存活细胞的方式是()
A.干冰内冻存
B.固定保存
C.液氮内冻存
D.甘油内保存
E.冷冻干燥
第5题
实验室中,保存细胞的方法一般是
A、甘油保存
B、冻干保存
C、牛奶管保存
D、液氮保存
E、半固体保存
第6题
杂交瘤细胞的冻存采用液氮保存的温度是
A、-20℃
B、-30℃
C、-50℃
D、-196℃
E、-80℃
第7题
厂家生产的抗IgG制剂一般的保存方法为
A、室温保存
B、液氮冻存
C、真空干燥保存
D、-20℃保存
E、加叠氮钠保存
第8题
杂交瘤细胞的冻存均采用液氮保存的温度是()
A、-20℃
B、-30℃
C、-50℃
D、-100℃
E、-196℃
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!