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问题 单项选择题

男，13岁，前牙反，磨牙中性关系，尖牙近中关系，ANB角为1°。该患者的诊断为（）。

A.毛氏II1，安氏Ⅰ

B.毛氏II3，安氏Ⅰ

C.毛氏II1，安氏Ⅲ

D.毛氏II3，安氏Ⅲ

E.毛氏II2，安氏Ⅰ

答案

参考答案：B

选择题

家鸡的无尾(M)对有尾(m)是显性。现用有尾鸡(甲群体)交配产生的受精卵孵小鸡，在孵化早期向卵内注射微量胰岛素，孵化出的小鸡(乙群体)表现无尾性状。为研究胰岛素在小鸡孵化过程中是否引起基因突变，可行性方案是[ ]

A．甲群体×甲群体，孵化早期向卵内不注射胰岛素

B．甲群体×乙群体，孵化早期向卵内注射胰岛素

C．乙群体×乙群体，孵化早期向卵内不注射胰岛素

D．乙群体×乙群体，孵化早期向卵内注射胰岛素
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填空题

根据首字母，汉语意思提示完成句子。

1. Do you often read books in the l ______?

2. There is a store in front of our b ______?

3. I can d ______ ballet.

4. Mike and Mary came to Kangkang's home to c ______ his birthday.

5. I will go to Hainan for my summer h______.

6. Did you r ______ a Chinese poem at the party?

7. My favorite s ______ is winter.

8. What's the w______ like today?

9. I am going to t ______ to some places of interest.

10. In the Spring F          , Chinese people make dumpling and perform lion and dragon dances.

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