DNA分子上具有遗传信息的片段叫______．

25岁的流行性出血热患者，出现烦躁，浮肿，脉洪大，体表静脉充盈，血压170／100mmHg，心率128次／分，应考虑为（）

A.肺实质弥漫性出血早期

B.高钠血症、高钾血症

C.高血容量综合征

D.高血压脑病

E.尿毒症

在光滑的水平面上，有两个相互接触的物体，如图所示，已知M>m，第一次用水平力F由左向右推M，物体间的相互作用力为N₁；第二次用同样大小的水平力F由右向左推m，物体间的相互作用力为N₂，则( )

A．N₁ >N₂

B．N₁ =N₂

C．N₁ <N₂

D．无法确定

阅读理解。

     For many people, the name Baskin-Robbins is linked to sweet memories of eating ice cream. Irvine

Robbins, who helped create this famous company, died in May at the age of ninety. His life's work of making

fun and exciting ice cream flavors changed the way Americans enjoy this food. Irvine Robbins opened his first

ice cream store in 1945 in California. At the time, there were no stores that sold only ice cream. His sister's

husband, Burton Baskin, also opened his own ice cream stores. In 1948 they combined their six stores into one

business. Baskin and Robbins realized that they were too busy to operate each store well. So, they decided to

sell part of each operation to the manager of that store. This permitted the company to grow quickly. By 1953,

they renamed their company Baskin-Robbins. They advertised that they sold 31 kinds of ice cream to show the

many choices buyers had. There was one flavor for every day of the month. Robbins and Baskin sold "Lunar

Cheesecake" the day after astronauts landed on the moon in 1969.Other flavors included "ChaChaCha", for

cherry chocolate chip, and Robbins' personal favorite "Jamoca Almond Fudge". They said:"We sell fun, not just

ice cream." By 1967, there were 500 Baskin-Robbins stores in the United States. The business partners sold

their company that year. Today, there are more than 5,800 Baskin-Robbins stores around the world.

1. What is the main idea of the passage?

A. The managers of Baskin-Robbins.

B. The start of Baskin-Robbins.

C. The production of Baskin Robbins.

D. The great success of Baskin-Robbins.

2. From the text we learn that _____. 

A. Baskin-Robbins was the only shop selling ice cream in 1945

B. Baskin-Robbins was famous for their special ice cream flavors

C. Baskin-Robbins grew quickly because they combined their other stores together

D. there had been more than 5,800 Baskin-Robbins stores around the world by 1967

3. What was probably the main reason for Baskin-Robbins' success?

A. They sold not only ice cream, but fun.

B. They renamed their company.

C. They put all their hearts into the business.

D. They sold "Lunar Cheesecake".

4. It can be inferred from the passage that _____.

A. Jamoca Almond Fudge is Baskins' favourite

B. Cherry chocolate chip sells best

C. Robbins and Baskin were good at inventing new ice creams

D. Lunar cheesecake was invented for the astronauts

在金属拉伸曲线中，计算残余变形量时，是以（）。

A.力轴的平行线确定

B.曲线线性段的平行线确定

C.曲线的初始段确定

D.曲线的初始曲线段确定

最先应用“白底红新月”标志的国家是土耳其。