已知y=2x，则4x2-y2的值是______．

关于剥脱性角质松解症，正确的是（）。

A.瘙痒明显

B.合并局部多汗

C.有渗出

D.有过敏史

E.好发于手掌

患者男，53岁，陕西农民，因“发热5d”来诊。体温最高39.3℃，无头痛、咽痛；病后按“感冒”予以消炎退热治疗。查体：T39.0℃，P120次/min，BP120/90mmHg；双侧腋下及肩背部皮肤可见少许出血点，球结膜轻度充血、水肿；双肾区轻度叩痛。实验室检查：血WBC13.12×10⁹/L，PLT53×10⁹/L；尿蛋白（++）。

对确定诊断有价值的有（）（提示：入院后高热不退，当晚急查血常规：Hb162g/L，WBC22.49×10⁹/L，N0.89，PLT46×10⁹/L；PTA0.81，D-二聚体和纤维蛋白原降解产物轻度升高。）

A.性别

B.年龄

C.发病季节

D.白细胞计数明显增高

E.发热6d

F.血小板计数明显减低

G.尿蛋白（++）

H.D-二聚体增多

某企业以自产产品——电冰箱作为福利发放给200名职工。已知每台电冰箱的生产成本为2000元，售价为2500元，使用增值税税率为17%。那么该公司应该确认的应付职工薪酬为______元。

A．468000

B．400000

C．500000

D．585000

Students who work during term time to support themselves at university are far more likely to graduate with a poor degree, according to a government-funded study published yesterday.

Undergraduates with part-time jobs are a third less likely to get a first or upper second-class degree than other students, harming their career chances. Students from the poorest backgrounds were most likely to take jobs during term because they could not depend on help from their parents.

The report, commissioned (委托) by the Department for Education and Skills, also found a clear relation between fear of debt and employment in non-graduate jobs. Students from poorer backgrounds are known to he more unwilling to be in debt than those from middle class families.

The study of 8,600 people who graduated in 1999 was made by Peter Elias, of Warwick University, and Kate Purcell, from Bristol Business School. They found that twice as many first-class degrees were awarded to students who did not work during term compared with those who did. Between 35 and 38 percent who worked during term achieved a lower second, compared with about 28 percent of those who did not.

Professor Elias said that the increase in school fees next year to ￡3,000 would have to be monitored (监控) carefully for its effect on poorer students. "Higher education is going to be a harder struggle for those who do not come with all the advantages," he said.

He suggested that universities could get in touch with employers to provide work experience on good salaries to choose students during holidays, so that they did not have to work during term.

小题1:What's the main idea of the passage?

A．Students at university like to take part-time jobs to support themselves,

B．Term-time jobs at university lead to poorer examination results.

C．The school fees are becoming higher and higher at university.

D．Students at university have much difficulty getting first-class degrees.小题2:Why did lots of students take term-jobs at university?

A．No one would lend them money to continue their study.

B．They wanted to improve themselves by taking part-time jobs,

C．Their families were poor and couldn't afford the high expense.

D．They thought earning money was more important than studying.小题3:Students who took term-jobs at university ____.

A．had no possibility to study better than those who didn't

B．couldn't graduate from school normally in the future

C．might have trouble in finding a job in the future

D．were more independent than those who didn't in the future小题4:Which of the following statements is TRUE according to the passage?

A．Poor students can't take part-time jobs all the time at university.

B．Employers have the duty to help poor students solve the money problem.

C．First class degrees couldn't be given to the students whose families were poor.

D．High school fees are one of the important reasons why students have to take term-jobs.

抓铲挖掘机可以挖掘停机面以上及以下的掌子，水利水电工程中常用于开挖( )土。

A．Ⅰ～Ⅱ类

B．Ⅰ～Ⅲ类

C．Ⅰ～Ⅳ类

D．砂