题干

将一根20厘米的细铁丝,剪成3段,拼成一个三角形,以下哪些剪法是可以的.(   )

A:8厘米、7厘米、5厘米

B:13厘米、6厘米、1厘米

C:4厘米、9厘米、7厘米

D:10厘米、3厘米、7厘米

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答案(点此获取答案解析)

A,C

同类题1

阅读下面新闻,回答问题。

      ①中新网北京2013年1月18日电(记者  孙自法)  中共中央、国务院1月18日在北京人民大会堂举行2012年度国家科学技术奖励大会。“‘嫦娥’二号工程”被授予国家科学技术进步奖特等奖。

      ②“嫦娥”二号卫星于2010年10月1日发射,至2011年4月1日半年设计寿命期满,全面实现既定的六大工程目标和四大科学探测任务。随后于2011年4月下旬至5月底,开展补拍月球南北两极漏拍点、再次对“嫦娥”三号预选着陆区进行高清晰成像等两项拓展试验。同年6月上旬起开展第三项拓展试验——受控从月球轨道出发飞往日地拉格朗日L2点,“嫦娥”二号环绕L2点进行为期10个月的科学探测后,拓展试验圆满成功。

      ③2012年6月1日,“嫦娥”二号卫星受控成功变轨,脱离L2点环绕轨道,飞往图塔蒂斯小行星,开展再拓展试验。12月13日,“嫦娥”二号卫星成功飞抵距地球约700万千米远的深空,以10.73千米/秒的相对速度,与图塔蒂斯小行星由远及近“擦肩而过”,首次实现中国对小行星的飞越探测。当天16时30分,“嫦娥”二号与小行星最近相对距离达到3.2千米交会时,“嫦娥”二号星载监视相机对小行星进行光学成像,这是国际上首次实现对该小行星近距离探测。至此,“嫦娥”二号再拓展试验圆满成功,“嫦娥”二号工程完美收官。

      ④“嫦娥”二号再拓展试验的成功实施,使中国成为继美国、欧空局和日本之后第4个探测小行星的国家,它突破并验证卫星对小天体探测的轨道设计与飞行控制技术,实现中国航天飞行从40万千米到700万千米远的跨越,并开创中国航天一次发射开展月球、L2点、小行星等多目标多任务探测的先河。

      ⑤短短两年间,从距地球38万千米外的月球,到150万千米远的日地拉格朗日L2点,再到700万千米外的小行星……“嫦娥”二号卫星不断创造并刷新着“中国高度”。

同类题4

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项,选项中有两项为多余选项。

 A. Make sure you match the job description

 B. Be conscious of good interview manners

 C. Put your interviewer at ease

 D. Plan before you pursue

 E. Dress to make a good first impression

 F. Do be sincere

    Attending an interview with the intent to impress the hiring manager is dangerous if you go about it in the wrong way. Below are some things you can do to maximize your chances of getting the job.

____   

    True, sometimes interviewers aren't prepared themselves, but that doesn't mean they'll forgive you for the same mistake. Developing and following a plan at the beginning of a job search has a significant impact on its success. Research the job thoroughly. Think about how your previous experience qualifies you and how it compares to the work on offer. Set "process goals" to keep you on track toward your larger career goals. "Process goals" aren't big-picture objectives. They're "roll up your sleeves and make it happen" objectives.

 ____   

    You can't think of any personal weaknesses, you’ve overcome all your weaknesses, or you say you haven't given it a lot of thought. Mistakes? Not you. No one progresses in a career without making mistakes and learning from them. Trained interviewers will be looking to see if you readily acknowledge and admit your weaknesses and can describe mistakes you’ve made and what you learned from them. Never give a measured response that sugarcoats reality to a tough interview question about your past.

____   

    If you were a 6-foot, 5-inch, 250-pound Frenchman with strong arms and a bushy beard, would you apply for the part of Little Orphan Annie on Broadway? How ridiculous that image is. If you don't have an accurate understanding of what the job is all about, your opinion of how well-matched you are will be based on an inaccurate foundation. For example, sales professionals are expected to possess excellent communication skills, time management and organization skills. Make sure you have a full job description from the employer so you can match your skills to the job's requirements.

____   

    The best way to ensure a good first impression is to dress smart. What is appropriate depends on the particular employer and job but, generally speaking, it is better to dress formally while remaining comfortable. If you are unsure what to wear, you should always go with the most conservative, professional option. What you are wearing tells employers a lot about how serious you are about getting the job. The more confident and polished you appear, the more likely you are to leave the interviewer with a positive impression of you.

 ____   

    Learn as much as you can about how the interview will be conducted. Employers are looking for the candidate with the best knowledge and experience, but rarely do they hire for work skills at the expense of social skills. If you lack self-awareness, it shows. And it doesn't look good. Be on time for your interview. Be aware of your body language. Even in the critical small talk before the interview, make eye contact with your interviewer to convey confidence when you're speaking, smile when it's appropriate, and look alert.