神经根型颈椎病多有颈肩痛，向上肢放射，肌力可有下降，下肢步态不稳，压头试验阳性。()

Schilder病

根据《公路工程技术标准》，路面面层类型可采用沥青贯入、沥青碎石、沥青表面处治的有（）。

A.四级公路

B.三级公路

C.二级公路

D.一级公路

E.高速公路

宋代出现了“贫富无定势，田宅无定主”的现象，这反映了当时

A．财产平均分配

B．禁止土地买卖

C．实行土地国有化

D．土地所有权转移频繁

C

American teens are setting an example for their parents through their volunteer work,

according to a new poll by Harris Interactive. The random national telephone survey released this week by the charity World Vision found that more teens volunteer to support a charitable cause（56 percent） than have a part-time job（39 percent）.

Parents said 82 percent of the teens in their lives do something to support charitable causes, including volunteering, recruiting others to a cause, wearing a button or T-shirt or donating money. Forty-six percent of the adults surveyed said they volunteer their time, but they also take credit for inspiring their children to volunteer.

The Harris Interactive poll was conducted in the United States between Jan 29 and Feb 2 among 2,003 adults. Sara Johnson, a teacher who advises students at a private school in a Chicago suburb, says she's seen a resurgence of teen involvement in social causes since President Barack Obama was elected in November.

The Harris Interactive survey found a quarter of teens have become more involved in charitable causes or organizations as a result of the economic downturn, but the economy has also led to cuts in allowances, and has teens working more hours at a paying job.

Unlike many public high schools across the nation, Illiana Christian does not require its students to clock public service hours. Senior Melissa Martin said some kids are too busy with other commitments like sports and music, but most of her classmates do volunteer.

Alynn Woodson, director at Habitat for Humanity International, said she has noticed a new enthusiasm among teen volunteers for the organization. Habitat for Humanity celebrates the 20th anniversary of its alternative spring break program this year and is expecting more than 12,000 young people to help build homes for low-income people around the nation.

63．What’s the main idea of the passage?

A．It is surveyed that more teens volunteer to support a charitable cause nowadays.

B．Illiana Christian asks its students to clock public service hours strictly.

C．American parents are setting an example for their children through their volunteer work.

D．The financial crisis led to the employment of American parents.

64．The underlined word “resurgence” in the third paragraph most probably means      .

A．replacement     B．recall C．review      D．return 

65．Which of the following statements is NOT TRUE according to the passage?

A．About 12,000 young people will help build homes for low-income people around the nation.

B．In Illiana Christian, teens are busy with sports and none of them do volunteer.

C．The majority of the teens in their lives do something to support charitable causes.

D．Forty-six percent of the adults surveyed said they volunteer their time.

66．We may infer from the passage that          .

A．American teens prefer charitable causes to attending school.

B．People noticed a new enthusiasm among teen volunteers for the organization.

C．The majority of the adults are not willing to volunteer their time.

D．Habitat for Humanity celebrates the 20th anniversary this year.

我公司甲醇装置锅炉水中磷酸根控制范围多少？为何要控制在一定范围内？