题干

关于电场线的特征,下列说法中正确的是(  )

A:如果某空间中的电场线是曲线,那么在同一条电场线上各处的场强不相同

B:如果某空间中的电场线是直线,那么在同一条电场线上各处的场强相同

C:如果空间中只存在一个孤立的点电荷,那么这个空间中的任意两条电场线不相交;如果空间中存在两个以上的点电荷,那么这个空间中有许多电场线相交

D:电场中任意两条电场线都可以相交

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答案(点此获取答案解析)

A

同类题2

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       Oxford University has introduced confidence classes for female students to get them to compete for jobs in future and win chances to work in best companies.

       They may be young and gifted, but research at the excellent institution has found that female undergraduates(大学生)are shying away from applying for jobs in banking, finance, management consultancy(咨询), engineering and resource management. Partly as a result, starting salaries for women when they graduate are on average £2,000 to £3,000 lower than their male counterparts.

    “Women are earning less on leaving Oxford.It is ridiculous,”said Jonathan Black, the careers service director at the university.“We have high quality and high achieving students of both genders.But it appears that women are selecting lower paid jobs. They accept more prejudice in certain industries and are saying 'I won't struggle for that really high paid job'. We are not trying to push loads of women but we are trying to say, you should feel able to apply for these sorts of jobs.Boys seem to have more self­confidence and see the bigger picture generally, even though their self­belief is not necessarily based on any greater academic advantage.”

       The four­day programme at Oxford will help 45 female undergraduates improve their self­confidence and decision­making, think positively and build up their strengths. Confidence training will teach them how to deal with the opposition and challenging situations.

       Successful female employees from RBS and BP, which are supporting the course, will talk about their lives and careers. RBS's involvement follows a promise by the bank to increase its national percentage of female graduate applications from 35 percent to 50 percent by 2014.

       Sophie Kelley, 20, studying law at Oxford, is hoping the course will make her more confident in courses and interviews.“I am applying to London's law firms for vacation schemes and it is so competitive,”she said.“The rejection letters don't give any real feedback(反馈), so I'm expecting the programme might give me a hand and some advice.”

Notes:

①institution n.社会公共机构,制度,制定 ②counterpart n.与对方地位、作用相当的人(或物) ③gender n.性别 ④prejudice n.偏见,成见

同类题4

改革是社会发展的动力,每一个国家、每一个民族要发展进步,就必须与时俱进,敢于创新。阅读材料,回答问题。

材料一 : 行之十年,秦民大说(悦),道不拾遗,山无盗贼,家给人足。民勇于公战,怯于私斗,乡邑大治。

──《史记•商君列传》

材料二:孝文帝召见群臣,说:“现在要禁用鲜卑语,统一使用汉语……30岁以下的人和在朝廷做官的人,不得继续使用鲜卑语,明知故犯,就要降职和罢官。”

材料三:  百日维新的主要内容

经济方面

保护农工商业,提倡开办实业;奖励发明创造,发展科学技术

政治方面

广开言路,准许民众上书言事;精简机构,裁汰冗员,澄清吏治

文教方面

改革科举制度,废除八股文;鼓励兴办学堂,创设京师大学堂;提倡办报、译书、出国留学

军事方面

整顿陆海军,裁减冗兵,采用新法练兵,增强海防实力

──摘自中华书局版《中国历史》(八年级上册)

材料四:兹依照本法令……所指导的办法,将用以束缚定居在地主领地上的农民和家务农奴的农奴制度永远废除。

材料六:  1978年12月18日的北京,白雪皑皑,空气新鲜。在“文革”结束之后,中国面临向何处的重大历史关头,在这里召开了一次关系党和国家前途命运的极为重要的会议……中国实现了伟大的历史性转折。

对该国历史发展具有什么进步意义?

材料五:过去的西洋文明史是外国人引进的,从今后我们日本人要用自己的手将西洋文明带入国内。

──1868年某日本官员