目前最常用的键盘和鼠标结构是______。A．机械式键盘和机械式鼠标 B．电容式鼠标

根据短文内容，判断下列句子的正误，正确的用“T”，错误的用“F”。（每小题1分，共5分）

Today more and more people are using refrigerators. Some are big, others are small. Big ones have two or three doors. Such refrigerators can not only keep the food cold and fresh, but also make ice and freeze the food. However, small ones usually have one door and can only keep things cold and fresh.

There are also refrigerators that are friendly to the environment. In the 1970s, the world was in energy crisis(危机). Refrigerators use too much energy. So people began to think of ways to improve it . At last a kind of new refrigerator was made. They use very little energy, but they’re too expensive. They cost twice or three times more than the ones that we use at home. However, people believe they will be cheaper and cheaper. As a result, they will be more and more popular.

In the future, there will be refrigerators that can do more than we can imagine. They are called smart refrigerators(智能冰箱) . They have tiny computers inside, with their screens on the door. They can show us what food is inside. They can also tell us what food to buy.They can even let us know what food to eat when we input the necessary health information. The more surprising thing is that they can do shopping for us when they are connected(连接) to the supermarket.

小题1:Small refrigerators can not only keep the food cold but also freeze the food.　

小题2:Refrigerators that use very little energy are more expensive.

小题3:Friendly refrigerators will be popular some day.

小题4:Refrigerators that keep the food fresh are smart refrigerators.

小题5:We can have a “talk ” with smart refrigerators.

《史记·商君列传》载：“商君相秦十年，宗室贵戚多怨望。”这主要是因为商鞅变法

A．奖励耕织

B．规定按军功授爵赐田

C．承认土地归私人所有

D．准许土地自由买卖

收入分配与社会公平

（1）社会公平的重要体现：合理的___________是社会公平的重要体现

（2）维护和实现社会公平

①坚持和完善按劳分配为主体，多种分配方式并存的分配制度，为实现社会公平提供__________。

②保证_________在国民收入分配中占合理比重、___________在初次分配中占合理比重是实现社会公平的重要举措。

③再分配更加注重公平：加强政府对收入分配的调节，保护___________，调节过高收入，取缔___________。

（3）处理好效率与公平的关系

①效率与公平的关系：效率与公平具有一致性。一方面，_________是公平的物质前提。另一方面，____________是提高经济效率的保证。

②如何处理好效率与公平：既要反对____________，又要防止收入差距悬殊；既要落实分配政策，又要提倡___________；在鼓励人们创业致富的同时，倡导回报社会和__________。

在机场区域内，仪表飞行航空器距离障碍物最高点的最低垂直间隔，丘陵和山区不得小于（）米。

A.300

B.400

C.500

D.600

液态烃膨胀后的体积变化比较大，当温度每升高15℃，体积增加（）。

A.2.0%~7.4%

B.2.5%~7.4%

C.2.0%~8.4%

D.2.5%~8.4%