任何一个具有两个属性的关系A．可能属于1NF B．可能属于2NF C．可能属于3NF

在赤道附近的地磁场可看做是沿南北方向的匀强磁场，磁感应强度的大小是0.5×10^－4T。如果赤道上有一根沿东西方向的直导线，长20m，通有从东向西的电流30A，问地磁场对这根导线的作用力有多大？方向如何？

Job advertising on the web

Register a new account

Log in to an existing account

Promote your casual work, graduate or internship(实习职位),opportunity with an advertisement on the Careers Centre database free of charge. Your advertisement will be viewable to all university of Sydney students and appear in 'Job Alert' – a daily email to subscribing students. You can also target alumni (up to five years after graduation) – advertise on our database and it will be visible at AlumniOnline.

If you advertise through the Careers Centre you will need to agree to our advertising terms and conditions.

Unpaid work

We are unable to advertise unpaid internship work experience or volunteer positions unless:

the position fulfills part of a University curriculum and has faculty approval, or

it is a volunteer position with a registered not-for-profit organisation.

Our unpaid and volunteering work info brochure has essential information for employers wishing to offer unpaid work including alternative suggestions. You can also contact the Careers Centre for assistance.

Submit an advertisement

To upload your job advertisement:

log in to the Careers Centre employer database – if you don't have a username you'll need to request a new account

click 'job ads' and fill out the form

agree to our advertising terms and conditions

submit your advertisement for review by the Careers Centre.

Advertisements are displayed for a maximum of two months. If your position is filled before your registered deadline please log in to the database and withdraw your ad.

What to include in your advertisement

We've found there is generally a better response to advertisements that are clear and informative. The following information is important to include:

job title and description of duties

skills and/or experience required

hours worked, and flexibility with regard to study/exam timetables

location of the work

pay rate/basis of payment – visit the Fair Work online website for pay rates and other employment conditions, or call their help line on 131394

how to apply and close date for applications

your contact details, including email address and phone number for Careers Centre staff (these do not appear with the job advertisement, however they are required for office purposes should we need to contact you).

Cost

It is free to advertise on our jobs database.

Related services

For greater promotion of your opportunities, consider:

sending a targeted email-out to the students you wish to recruit（雇佣 ）

booking a booth at a careers fair if you are promoting a graduate or internship program.

Contact us

For help submitting an advertisement or more information, contact the Industry Development Team:

P (02) 8627 8408

E careers.administration@sydney.edu.aucareers.administration[at]sydney.edu.au.

小题1:What kind of people is the passage intended for?

A．people recruiting employers

B．members in the Careers Centre

C．job-hunters in university of Sydney

D．undergraduates who need to improve the ability to study and work小题2:Which of the following is TRUE according to the article?

A．Registering a new account every time you log in

B．Advertisements are displayed for a minimum of two months.

C．Advertising unpaid positions with registered non-profit organizations is permitted.

D．All job ads will appear online once they are submitted.小题3:What should be included in your advertisement?

A．job title, experience required and sex

B．hours worked, age and location of the work

C．marriage, contact details and location of the work

D．experience required, payment and contact details

股价同为10元股的A、B两只股票，当前市盈率分别为40倍和20倍。 问：(1)其每股收益各为多少 (2)如果从现在开始，A股票的每股盈利以每年比上年高40%的速度增长，B股票每股盈利以每年比上年高20%的速度增长，在市盈率不变的假设下，3年后，两者的股价将相差多少

对滑油中有机酸理解正确的是（）Ⅰ、少量的有机酸可增加油性，保持较好的边界润滑性能Ⅱ、有机酸含量过多，腐蚀白合金轴承的铅成分Ⅲ、油品中的杂质会使氧化速度加剧，使有机酸增加Ⅳ、油品的自身氧化使有机酸增加

A、Ⅰ+Ⅱ

B、Ⅱ+Ⅲ+Ⅳ

C、Ⅰ～Ⅳ

D、Ⅱ+Ⅳ

2012年6月29日，“神舟”九号安全返回，标志着“天宮一号”与“神舟”九号交会对接任务取得圆满成功，我国空间技术发展实现重大跨越，为我国进行深空探索奠定坚实的基础。空间有人交会对接任务的技术要求高、验证难度大，为此，科研人员成功突破了目标飞行器髙精度入轨、远距离导引控制、近距离自主导引交会等一系列关键技术。材料说明（）

①世界的可知性取决于人类的认识能力和水平

②人类能够限制规律发挥作用从而为自己造福

③要善于分析把握事物存在与发展的各种条件

④实践创新有利于扩展人类的认识范围和领域

A.①②

B.①④

C.②③

D.③④