银量法测定巴比妥类药物的碱性条件是（） A.新制的氢氧化钠溶液 B.制新的无水碳酸氢

在采用成本加酬金合同时，()合同价形式，可以促使承包商降低成本，缩短工期、而且目标成本随着设计的进展而加以调整，承发包双方都不不承担太大风险。

A、成本加定百分比酬金

B、成本加固定金额

C、成本加奖罚

D、最高限额加固定最大酬金

阅读理解。

     Some businesses and apartment buildings are telling kids to buzz off. A device called the

Mosquito is being used in the United Kingdom, Australia, and New York to keep kids from

gathering in big groups and causing trouble.

     The Mosquito makes a noise that only kids can hear. About 3,000 Mosquito units have

been fixed in the United Kingdom. In the United States, managers of an apartment building

in New York City recently fixed one to keep noisy kids from taking over the building's

entrance-hall. A children's rights agency (机构) in England wants the device forbidden. The

agency says the device unfairly targets teens. Some also worry that the high sounds could hurt

young ears. Fans of the Mosquito say it keeps kids out of trouble and off private property (财产).

     "Mosquito devices violate the human rights of kids. The use of the devices is targeted at kids

because it considers all kids as troublemakers. The devices are also harmful because the noise

could hurt kids' hearing. Besides violating our rights, the Mosquito is dangerous. It could hurt

the ears and the hearing of teens, babies and animals because they are more sensitive," says

California eighth grader Kelly Straky. "It is not right to place the device in a public place.

Teenagers have as much right to public places as adults. I listened to the Mosquito sound, and

it was extremely loud. It hurts not only your ears but also your whole head. It isn't just annoying;

it's painful. It should not be allowed."

     Fans of the Mosquito believe that property owners have a right to decide who can be on their

property and who cannot. Mosquito devices are a method of protecting private property and

keeping the peace. Property laws are put into place to protect the public.

     "Yes, I do believe that the rights of teens should be valued, but we must always put ourselves

in other people's shoes and see the other side. In this case, doing so allows people to understand

the negative effects, such as crime, that loitering (滞留) can have on an area or a community,"

said Kayla Hill from New York.

1. The underlined phrase "buzz off" in Paragraph one probably means _____.

A. stay inside  

B. go away      

C. sit down      

D. play games

2. According to the passage, the Mosquito _____.

A. gives off a special smell

B. is a safety tool aimed at youths

C. is mostly purchased by the police

D. is a safety tool aimed at thieves

3. We can learn from the passage that Kelly Straky _____.

A. values the rights of teens              

B. keeps a close eye on her private property

C. hears the noise of the Mosquito frequently

D. believes many kids are causing annoying problems

4. Who are probably fans of the Mosquito?

A. Pet owners.      

B. Teachers.      

C. Shop owners.  

D. Parents.

在规模报酬分析中包括下列哪些选项( )。

A．产品生产中所使用的所有要素都是可变要素投入

B．没有固定要素投入

C．规模报酬的分析属于长期分析

D．有部分可变要素投入

E．规模报酬分析属于短期分析

以下关于地理大发现过程的说法正确的是（）

A.最早到达印度的航海家是迪亚士

B.完成环球航行的是麦哲伦

C.16世纪初，人类已经发现了地球上的所有大陆

D.世界上最早从海路到达印度的航海家是的达·伽马

在委托有效期内，只要证券经纪商按委托内容代理买卖，委托人就不得拒绝接受交易结果。( )