处理冲突的有效途径是什么？

2011年8月26日消息，英国曼彻斯特大学的天文学家认为，他们已经在银河系里发现一颗由曾经的庞大恒星转变而成的体积较小的行星，这颗行星完全由钻石构成。若已知万有引力常量，还需知道哪些信息可以计算该行星的质量  （  ）

A．该行星表面的重力加速度及绕行星运行的卫星的轨道半径

B．该行星的自转周期与星体的半径

C．围绕该行星做圆周运动的卫星的公转周期及运行半径

D．围绕该行星做圆周运动的卫星的公转周期及公转线速度

WHEN an Iraqi journalist threw a shoe at former US President George W.Bush at a news conference last December,the president’s bodyguards quickly moved to protect him.

Those bodyguards were from the US Secret Service.Their job is to protect the president.Now America’s first black president Barack Obama also has the same people at his side.Here are some details about these mysterious men and women.

History

◇The Secret Service is known today for protecting public officials and their families.

However,when it began in 1865,it was started to protect money.A third to a half of all US money during the Civil War was fake (假的).President Abraham Lincoln created the United States Secret Service to find those responsibly.

◇The first 25 presidents had no special protection.That changed after President William Mckinley was murdered in 1901.

Who gets protection?

About 30 people get full-time protection in the United States (more in an election year).

Included are:

◇Presidents and vice-presidents and their wives,for up to 10 years after leaving office,and their children up to age 16.Anyone can decline protection after leaving office.Richard Nixon did.  ◇Candidates for president and vice-president,their wives and children at a cost of $500,000 a month for 30-plus special agents (特工).

◇The Secretary of State,National Security Adviser and others.The Secret Service also protects 80 to 200 visiting foreign political leaders every year.

Getting around

Rules for president

◇Limousines (豪华轿车) that can withstand a missile are used.

◇Entering and exiting are never done on a street.

◇Exact travel plans are kept secret.

◇Bulletproof reading stands for speeches are used.

Agent’s task

◇Teach the president how to wave and move.

◇Test his food for poison.

◇Use special radio channels for the police and the Secret Service.

◇Use X-ray checks before allowing entry to secure areas,and search bags.

◇Check lists of hundreds of people known to be dangerous.

◇Keep files on thousands of people who have made even vague threats.

◇Be part of counter-sniper (反狙击) teams.

小题1:What’s the purpose of writing the passage?

A．To tell us how to be a bodyguard.

B．To introduce the US Secret Service to us.

C．To give us some information about US

presidents.

D．To inform us of the incident at a news conference. 

小题2:Which is the special agent’s task according to

the US Secret Service?

A．Have dinner with the president’s family.

B．Teach the president to behave politely in

public.

C．Keep a record of possible murderers.

D．Check people carrying bags with X-ray.小题3:What do you know about the US Secret

Service from the passage?

A．It is made up of 30 people.

B．It protects only US presidents.

C．It is responsible for the safety of all

Americans.

D．It was created to protect money.小题4: Which of the following can be inferred from

the passage?

A．The bodyguards from the US Secret

Service have no privacy.

B．The US Secret Service bodyguards’ job is

full of challenges.

C．No one knows the exact travel plan of

presidents.

D．Every president in American history has a bodyguard. 

根据艾宾浩斯的遗忘曲线，遗忘的进程是先快后慢，因此复习要。

班组的安全目标管理阐明了要防止以下六种恶性事故：（）。

A.人身死亡

B.重大火灾

C.大面积停电

D.电网瓦解

E.水电厂垮坝

F.主设备严重损坏

G.重大盗窃

下列选项中，不属于体征范畴的是

A．喉中痰鸣
B．耳鸣
C．太息
D．肠鸣