患者，男性，45岁，一个月前发现右下后牙牙龈有白色小疱，平时有轻微胀痛不适，右下4面

发布时间：2017-05-05 02:57 │ 来源：www.tikuol.com

题型：单项选择题共用题干题

问题：

患者，男性，45岁，一个月前发现右下后牙牙龈有白色小疱，平时有轻微胀痛不适，右下4面龋深及髓，牙髓无活力，叩痛（-），X线片见右下4根尖透射区不规则，边界模糊。

主诉牙应诊断为（）。

A.慢性牙髓炎

B.慢性牙槽脓肿

C.根尖囊肿

D.根尖肉芽肿

E.慢性牙周炎

考点：口腔医学(医学高级)口腔内科学口腔内科学题库

题型：单项选择题共用题干题

阅读理解。

     Big ocean fish have almost been endangered since the start of business fishing in the 1950s. The scientists
found that the number of large fish has dropped by 90 percent in the past fifty years. The study took ten years.
The researchers collected records from fishing businesses and governments around the world. The magazine
Nature published (发表) the findings.
     The scientists say the common way called longline fishing is especially harmful to large fish. This way
includes many fishing lines that are connected (连接) to one boat. If these lines are joined together, they can
reach one hundred kilometers. They hold thousands of sharp metal hooks (钩) to catch fish. Longline fishing
is especially common in the Japanese fishing industry. Records showed that Japanese boats used to catch about
ten fish for every one hundred hooks. The study says longline fishing boats now might catch one fish per
hundred hooks.
    The scientists say business fishing can destroy groups of fish much faster than in the past. It's not the only
worry that the number of large fish is becoming smaller and smaller. What's worse, they are smaller in size than
their ancestors (祖先).

根据短文内容完成表格，每空一词。
What is happening to ocean fish?

Items (项目)	Situations	Results
1._____ _____of ocean fish	The number of ocean fish has dropped by 90% in the past fifty years.	The number of fish 2._____ _____. Smaller and smaller.
The size of ocean fish	Big ocean fish have almost been 3._____ since the start of business fishing in the 1950s.	The size of ocean fish is not 4._____ _____ as that in the past.
The way of fishing (捕鱼)	Long-line fishing can be especially had to 5._____ _____.	Business fishing can destroy fish groups a lot faster than in the past.

查看答案

题型：单项选择题共用题干题

结构主义——符号学电影理论

查看答案

题型：单项选择题共用题干题

已知25%的氨水的密度为0.91 g/ml，5%的氨水密度为0.98 g/ml，若将上述两种氨水等体积混合，所得氨水的质量分数 ( )

A．等于15%

B．大于15%

C．小于15%

D．无法确定

查看答案

题型：单项选择题共用题干题

I want to________medicine after graduating from college.[ ]

A. take in

B. take up

C. take over

D. take down

查看答案

题型：单项选择题共用题干题

下列对于期权内在价值的理解，不正确的是( )。

A．内在价值是指在期权存续期间，执行期权所能获得的收益

B．买方期权的执行价格低于即期市场价格时，该期权具有内在价值

C．卖方期权的执行价格高于即期市场价格时，该期权具有内在价值

D．价内期权和平价期权的内在价值为零

查看答案

更多题库