问题 单项选择题

患者,女性,35岁。因左下颌区无痛性肿胀1年就诊,不伴左下颌疼痛。临床检查见左下颌角明显膨隆,皮肤色、温均正常,无波动感。口内左磨牙区龈颊沟丰满,舌侧膨隆明显,触有乒乓球感,黏膜无破溃。组织病理学见肿瘤上皮形成上皮岛,中心由多边形或角形细胞疏松连接类似成釉器星网状层,星网状区常发生囊性变,上皮岛周边细胞核极性倒置。

有可能的诊断是

A.角化囊肿
B.造釉细胞瘤
C.颌骨中心性癌
D.颌骨骨髓炎
E.骨肉瘤

答案

参考答案:B

解析:依据临床表现特点、组织病理表现和部位可诊断。

阅读理解

根据短文内容,选择正确答案。

     My friend Bob has an interesting hobby. He likes collecting stamps. He spends a lot of time on his

stamp collection after school hours. Now he has hundreds of stamps from all over the world.

     Bob likes stamps with pictures of animals and plants on them. In this way, he learns the names of

many animals and plants. He also borrows books on animals and plants from his school library. He learns

a lot from them.

     Sometimes Bob has many stamps of the same kind. He gives some of them to his friends. And they

give him others in return (回报).

     Bob often writes to his friends in many countries. He sends them stamps of his country. In return, they

send him stamps of their countries. 

     Bob thinks collecting stamps can bring him much knowledge, pleasure and happiness. And he can

make more friends from all over the world.

1. Bob spend a lot of time on his hobby ______.

A. during his holiday

B. after school hours

C. during school hours

D. on Sundays

2. Bob learns a lot about animals and plants from ______.

A. his teachers

B. his friends

C. his stamps      

D. his classmates

3. When Bob has stamps of the same kind, he ______.

A. sells them to his friends

B. throws then away

C. keeps them for himself

D. sends some of them to his friends

4. Bob often sends some stamps to his friends in many countries, and the friends ______.

A. send him other stamps in return

B. write him letters for thanks

C. give him some money

D. send him some foreign coins

5. Collecting stamps can make Bob ______.

A. very happy

B. learn much knowledge

C. make more friends

D. A, B and C

单项选择题