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【题目】色盲是伴X染色体隐形遗传病,一对正常的夫妇生出一个色盲的孩子,请回答下列问题:
(1)这对夫妇生出色盲患者的概率是_________ ;
(2)生出的男孩中,患色盲病的占 _____________ ;
(3)正常的男孩的基因型是____________ 。
(4)母亲的基因型是 。
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【题目】When can the book be borrowed from the library?
A. In June. B. In July. C. In September.
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【题目】What time will the two speakers meet?
A.At nine o'clock
B.Earlier than nine o'clock
C.Laterthan nine o'clock.
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【题目】听一段材料,回答下面几个小题。
【1】Where does the conversation take place?
A. At the TV station.
B. At the school gate.
C. Over the telephone.
【2】What can we learn about the man?
A. He doesn't care too much about his students.
B. He is an average football player.
C. He may be a teacher whom the students love most.
【3】Why does the woman interview the man?
A. To get some information about the teacher and his work.
B. To congratulate the teacher on his success.
C. To get school news for the TV station of the city.
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【题目】When did the man visit the Yellowstone Park?
A. This year. B. Last year. C. The year before last.
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【题目】听一段材料,回答下面几个小题。
【1】What will the woman probably do?
A. Bring some handkerchiefs.
B. Buy some gifts before she leaves.
C. Treat her customers to a big dinner.
【2】What is the man doing?
A. Giving advice.
B. Asking for permission.
C. Showing appreciation.
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【题目】听一段材料,回答下面几个小题。
【1】Where does the woman work?
A. At a university.
B. At a TV station.
C. At a newspaper office.
【2】Why is the man applying for this position?
A. He needs a well-paid position.
B. He has recently lost another job.
C. He wants some working experience.
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【题目】听一段材料,回答下面几个小题。
【1】Who is visiting the woman for the weekend?
A. Her brother.
B. Her student.
C. Her teacher.
【2】How does the woman know Ann?
A. She has just been introduced to her.
B. She has taken piano lessons from her.
C. They have met at a party before.
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【题目】听一段材料,回答下面几个小题。
【1】What is the relationship between the two speakers?
A. Doctor and patient.
B. Teacher and student.
C. Boss and employee.
【2】Why won't Mara go to work today?
A. She is busy with her work.
B. Her mother has got a headache.
C. She is not quite well today.
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