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问题 填空题 案例分析题

下图是果蝇体细胞模式图，请根据图回答：

W是红眼基因、w是白眼基因，位于X染色体上。该个体若与另一只白眼果蝇交配后，后代中雌性白眼果蝇占总数的（）

答案

参考答案：1/4

改错题

 短文改错（共10小题; 每小题1分，满分10分）

Dear Ken,

I’m writing to tell you everything about my                              1．      

hometown. I live in Briton, a small town, where has a                        2．     

population of around 30,000. It is in the coast about 50                       3．     

miles from London. It isn’t so interesting like London,                        4．     

and the air is much cleaner. There is little pollution.                            5．     

There’re many hotels and language schools here.                                 6．     

In summer it is full with travelers. My father used to                           7．     

working in a steel plant before he lost his job. He                               8．     

wanted to open a small shop, but he’s short of money.                         9．     

He wonders that if he can borrow some money from the bank.             10．     

Best regards,

Janet
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单项选择题

制作茸胶的最佳温度是______。

A．2℃

B．8℃

C．15℃

D．30℃
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