两电阻R1、R2并联时总电阻为4，接入电路中时，它们通过的电流I1：I2=1：2

根据《政府采购货物和服务招标投标管理办法》的规定，招标采购单位可以视采购具体情况，延长投标截止时间和开标时间，但至少应当在招标文件要求提交投标文件的截止时间（）日前，将变更时间书面通知所有招标文件收受人，并在财政部门指定的政府采购信息发布媒体上发布变更公告。

A.2

B.3

C.5

D.10

水管直径d=100mm，管中流速v=1m／s，运动粘度v=1．31×10^-6m²／s，管中雷诺数为（）

A.54632

B.67653

C.76335

D.84892

阅读理解。

     The debate over children from other European countries in Britain's school was refired after the country's

leading teachers told The Observer that rising numbers of foreign pupils are putting some of schools near the

breaking point.

     Members of the National Association of Head Teachers will this week tell the government that the problem

is starting to change the culture of some schools. Some heads said the situation was out of control.

     Though head teachers think the new pupils have great ability and they should be welcomed into schools,

they are worried that they don't have enough money to deal with the situation.

     "There is a feeling among some of our members that this is out of control and no one knows the final

solution," said Mick Brookes, general secretary of the NAHT. Brookes who will give evidence this week to

the government added,"some schools just don't know how many immigrant children they will have to admit."

He said that while schools could take in one or two foreign pupils, some were struggling with the sudden large

increase in the number of children overseas.

      Clarissa Williams, head of Tolworth Girls School in Kingston upon Thames, south London, said she

received &1,300 a year from the government to cover the costs of teaching English to foreign pupils but was

having to spend &30,000 of her own budget to keep pace.

     On Tuesday, the association will tell the House of Lords that education budgets have not kept pace with

the increase in the number of pupils for whom English is a second language, or not spoken at all, who have

entered Britain since the European Union expanded (扩大)

1. According to the passage, the main reason for the debate is _____.

A. Foreign pupils bring their cultures into Britain

B. Teachers work harder than before while getting paid less

C. The number of foreign pupils has increased too fast

D. The government doesn't listen to the head teachers

2. How much more does Clarissa Williams need to receive from the government to cover the costs

   of teaching English to foreign pupils each year?

A. &1,300

B.1,700

C. &30,000

D. &28,700

3. From the passage we know that _____.

A. pupils from other countries can not speak English

B. many schools have already reached the breaking points

C. British schools have profited from the expansion of the the European Union

D. the expansion of the the European Union has brought many foreign students to Britain

4. Which of the following actions may most probably be taken by the government to solve the problem?

A. Close down some school

B.  Drive away some foreign students

C. Hire more English teachers

D. Increase education budgets

患者男性，40岁，因“颈椎钩突骨质增生5年；颈、肩、手臂酸痛，颈椎活动受限2天”来诊。患者5年前突感颈肩酸痛、右手稍有麻痹，因症状不重未就医。数天后复发，在外院诊断颈椎钩突骨质增生，治疗后好转。近2天，受寒气侵袭出现颈、肩、手臂酸痛，颈椎活动受限，食欲、睡眠质量、大小便均正常。查体：左上肢手臂及左手虎口区麻木，双侧霍夫曼征（-）。

患者目前颈椎椎间盘突出节段最有可能是（）

A.第3～4颈椎

B.第4～5颈椎

C.第5～6颈椎

D.第6～7颈椎

E.第7颈椎～第1胸椎

手动液压泵高压输出压力为（）。

A.20Mpa

B.63Mpa

C.108Mpa

D.200MPa