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问题 单项选择题

男，14岁，持续性鼻塞、嗅觉减退，流脓涕数年，CT检查如图，最可能的诊断为（）。

 

A.鼻炎及鼻窦炎

B.鼻及鼻窦息肉

C.过敏性鼻炎及鼻窦炎

D.恶性肉芽肿

E.上颌窦癌

答案

参考答案：A

完形填空

短文填空（本大题有10小题，每小题1.5分，共15分） 

Li Ming was a good school boy before. He  小题1:  to do well in all his lessons. But these days he turned out to be another Li Ming. He  小题2:  asleep in class. He has been late for school three times since last Friday. Yesterday they took an English test. He failed. But he always got over 90 before. His head teacher, Rose, didn’t know  小题3: . So she decided to go to his home and found out the reason. On her 小题4: to his home, she passed by a net bar. To her  小题5: , she saw Li Ming playing computer games excitedly inside. Then she  小题6: what had happened. She went into the net bar and pulled him out. Li Ming was very frightened because she was very  小题7: with him. He didn’t know how she would deal with him. She  小题8: beat him nor punished(惩罚) him. Instead, she told him playing computer games was bad for his health and  小题9: . She also asked him not to lose himself in it. Li Ming  小题10: to give up computer games and study hard to achieve his dreams.

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填空题

科学工作者将一种普通（产量不高）的矮秆（抗倒伏能力强）小麦与一种高产的高秆（抗倒伏能力差）小麦作亲本进行杂交。在后代植株中出现了普通高秆、普通矮秆、高产高秆、高产矮秆四种类型的小麦。选择出其中的高产矮秆植株进行繁殖和培育，再经若干代的选择培育后便得到了高产矮秆的新品种。据此回答：  

(1)题中提到的相对性状有哪些？__________。  

(2)子代中出现了和亲本一样性状的小麦，这种现象叫______。  

(3)子代中出现了普通高秆和高产矮秆这两种类型，这种现象叫_______。  

(4) 科学工作者从后代中选出对人类有益的变异类型进行培育，这种方法叫_______。
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