5-溴尿嘧啶能代替胸腺嘧啶与腺嘌呤配对。现将含有两对同源染色体

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问题选择题

5-溴尿嘧啶能代替胸腺嘧啶与腺嘌呤配对。现将含有两对同源染色体的精原细胞，放在含5-溴尿嘧啶的原料中进行减数分裂。则该细胞所产生的四个精子中，含5-溴尿嘧啶的精子占[ ]

A．25%

B．50%

C．75%

D．100%

答案

答案：D

完形填空

单词拼写（共10小题；每小题1分，共10分）

小题1: A great celebration was held on his _________(50岁)birthday.

小题2:He dived into the water, leaving only his face _________(暴露)

小题3: Some people work together under _________(压力)

小题4:He said he was late because of a traffic jam. But it didn’t sound like

a _ （合理）enough excuse.

小题5: A _______（图书管理员）is a person who helps you when you want to borrow books from a library.

小题6: They needed five more ____ (工程师) to complete the design.

小题7:They were _______(秘密地)married last week.

小题8: She was well known as an ______(出色) dancer

小题9:His job is to do ________(科学)research.

小题10:He has formed the habit of getting up and going to bed early and does

everything ________(有规律)

单项选择题 A1型题

痰饮、悬饮、支饮、溢饮命名的主要依据是（）。

A.饮邪多少

B.饮停新久

C.饮停部位

D.饮邪性质

E.饮停临床意义