题干

等位基因是指(    )

A:一个染色体的两条染色单体上的基因

B:一个DNA分子的两条长链上的基因

C:同源染色体的同一位置上的基因

D:同源染色体的同一位置上控制相对性状的基因

上一题 下一题 0.0难度 选择题 更新时间:2019-03-23 08:43:41

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D

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PRIVATE ENGLISH LESSONS

    An experienced teacher is offering private lessons in English.

Please email me at the address below and tell me.

    ·Your age

    ·Reasons for learning English

    ·Your level of English

    ·Areas that you need to focus on--grammar,listening,speaking,reading,writing,etc.

     Mrs Daniels(daniels@mail.corn)

Dear Mrs Daniels,

         I recently saw your advertisement on the university website offering private English lessons.I'm very interested in your private lessons and would like some more information.I am a student at Aston College here in Hong Kong studying English,so my language level is already quite good.

     However,I feel that I need to improve my listening and speaking skills.This is because I'm planning to study at London University in England next year and I think your lessons will help me to live and study abroad.

     Could you send me some more information about the lessons offered,such as where and when they will be held and how much they cost? Also,I would like to know whether you teach students in groups or one-on-one.

     I would be glad to supply any further information you might need.

                                                                                                                                 Regards,

                                                                                                                                                                 Li Hua