房地产经纪业存在和发展的基础是（ ）A．佣金 B．手续费 C．差价 D．信息费

Sports can help you keep fit and close to nature. However, whether you are on the mountains, in the waves, or on the grassland, you should realize that sport you choose might have great influence on the environment.

Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also lots of water. Besides, huge amounts of energy are used to keep its courses（球场）in good condition. This causes major environmental changes. For example, in the dry places of Portugal and Spain, golf is often held responsible for (为...承担责任） serious water shortage(短缺) in some local areas.

There are many environment-friendly sports. Power walking is one of them that you could take up today. You don't need any special equipment except a good pair of shoes, and you don't have to worry about resources and your purse. Simple and free, power walking can also help you stay healthy. If you walk regularly, it will be good for your heart. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and keep thin.

Whatever sport you take up, you can make it greener than by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be "green gyms." They are better replacements(替代) for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership(会员身份)． And best of all, it's free.

小题1:Which of following does the author most probably support according to the passage?

A．Bicycling around the lake.

B．Car racing on the road.

C．Playing basketball in a gym.

D．Swimming in a sports center.小题2: What does the phrase "resource-hungry" in this passage mean in Chinese?

A．广为流行的.

B．亲近自然的.

C．低成本的.

D．耗费资源的.小题3: The author uses power walking as an example mainly because

A．it is an outdoor sport.

B．it is loved by many people.

C．it uses fewer recourses.

D．it is supported by experts.小题4:The author writes the passage to_______.

A．show us disadvantages of golf.

B．encourage us to take part in green sports.

C．explain the major sports influence of popular sports,

D．discuss different kinds of environment-friendly sport.

在化学反应中，有元素的化合价发生变化的反应就是氧化还原反应．例：

2Na+Cl₂═2NaCl，反应前后，Na、Cl的化合价发生了变化，该反应是氧化还原反应．

（1）根据化合价是否变化分析，下列反应属于氧化还原反应的是（填序号）______．

A．2Mg+O₂

点燃  .

2MgO              B．CaO+H₂O═Ca（OH）₂

C．2KClO₃

MnO2 .

△

2KCl+3O₂↑         D．CaCO₃ 

高温  .

CaO+CO₂↑

E．H₂+CuO

△   .

 Cu+H₂O              F．HCl+NaOH═NaCl+H₂O

（2）含有高价态的化合物，通常具有氧化性，如在氯化铁溶液中，氯化铁能将单质铜氧化成氯化铜，自身被还原成氯化亚铁．该反应的化学方程式可表示为______．

软件开发模型是指软件开发的全部过程，活动和任务的结构框架。主要的开发模型有瀑布模型、演化模型、螺旋模型、喷泉模型和智能模型。螺旋模型将瀑布模型和演化模型相结合，并增加了 (15) ，它建立在 (16) 的基础上，沿着螺线自内向外每旋转一圈，就得到其一个新版本。

喷泉模型描述了 (17) 的开发模型，它体现了这种开发方法创建软件的过程所固有的 (18) 和 (19) 的特征。

（16）处填（）。

A．模块划分

B．子程序分解

C．设计n原型

某建筑公司雇工修建某镇农贸市场，但长期拖欠工资。县劳动局作出《处理决定书》，要求该公司支付工资，并加付应付工资50%的赔偿金。该公司在法定期限内既未履行处理决定，也未申请行政复议和提起诉讼。下列哪一选项是正确的

A．县劳动局申请法院强制执行，应当自该公司的法定起诉期限届满之日起90日内提出

B．县劳动局申请法院强制执行，由该县法院受理

C．县劳动局申请执行应当提交的全部材料包括申请执行书、据以执行的行政法律文书、证明该具体行政行为合法的材料

D．法院受理申请执行案件后，应当在30日内由执行庭对行政处理决定的合法性进行审查

血站执业及中心血库开展采供血业务，必须经执业验收及注册登记。其中血液中心的执业验收由（）

A.卫生行政部门进行

B.国务院卫生行政部门委托输血协会进行

C.卫生行政部门委托卫生监督所进行

D.卫生行政部门医政司

E.红十字会