问题 单项选择题

亚马逊丛林中的雄性蓝蝶带有彩虹般的蓝色光辉,半公里外就能看到.其光辉如此强烈,有的竟能反射70%的蓝色光线,远远超过蓝色涂料的反射率.蓝蝶耀眼的光辉,原是一种警号,使别的雄性蓝蝶在远处就能知所趋避.蓝光越强,示警作用越显著.物竞天择,适者生存.亿万年的自然选择,使亚马孙蓝蝶翅膀有了如此奇妙的性能.这种性能,早在一百多年前就被人发现了,但其奥秘直到最近才被揭开.原来蓝蝶翅膀上覆盖着许多微小鳞片(就是触摸蝴蝶翅膀时会沾手的粉),其表面有许多平行的脊状突起物.观察脊的截面,会发现其中包含着许多平行排列的羽状物.“羽毛”的主干两边生出若干分支,分支的长度沿主干从根到梢逐渐变短,其结构类似于人造的多层介质反射镜.人造多层介质反射镜的反射光有很强的方向性:对接近垂直入射的单色光线反射率极高,但对斜入射光线的反射率很低.令科学家们大吃一惊的是:蓝蝶翅膀的反光却是广角的,可以在很大范围内看到.这种奇妙性能缘于那些羽状物的分支并非完全位于同一平面内,而是各具略为不同的倾斜角,使反光的视角大为增加.蓝蝶的翅膀还具有颜色选择性.其羽状物的尺寸.恰好能增强蓝光的反射,而且其分支越多,反光就越强.一种仅有6到8个分支的蓝蝶翅膀,仍比蓝色涂料的反光率高出一倍以上.蓝蝶翅膀的反射光颜色随不同的视角略有变化,从蓝色到紫色,一直延伸到人眼看不见但蓝蝶能看见的紫外线.目前人们正在研究蓝蝶的反光机理,想仿造应用.比如改善公路上的路标,改善电脑的液晶显示器.军事部门感兴趣的是仿蓝蝶翅膀的反光结构,将之用于可随环境变换色彩的新型迷彩伪装;服装公司则设想,仿蓝蝶翅膀做出的具有特殊反光性能的衣料,将使时装展示台上更加异彩纷呈.最重要的应用当然是有价证券的防伪,因为再先进的复印机也无法印造出具有精细立体结构的蓝蝶翅膀来.纽约州立大学的一位昆虫学家说:“蓝蝶做到了工程师们试着做却未能成功的事.”的确,正在研究中的人造模仿物,在光学性能上仍无法与蓝蝶的翅膀相比.

根据文意,下列推断不合理的一项是______.

A.从飞越亚马逊丛林的小飞机上,有可能看到蓝蝶发出的蓝色闪光

B.人造的多层介质反射镜,其反射光不够强烈,是因角度所限

C.亚马逊丛林中美丽的蓝蝶,可能成为制造假钞罪犯的“克星”

D.有关蝴蝶的传说,可能因蓝蝶反光的奥秘被揭开而更添浪漫色彩

答案

参考答案:B

解析:B选项明显不对.

填空题

Do You Need an MBA


Perhaps you have seen the media stories and some of the exciting career opportunities of MBAs, and you imagine, "That could be me ... " You might be well into the career of (26) dreams, but you have been told you will need an (27) to advance. Or, you may be at a (28) in your career and wonder how you should make a translation. (29) of what initially inspired you to consider an MBA degree, you (30) start with a thorough self-assessment process that will help you match your personal strengths and interests with your professional ones to help you explore (31) an MBA makes sense for you.
(32) helps you focus and articulate your thinking. Exhibiting undirected thinking or behavior might (33) you from gaining admission to an MBA program. More importantly, you will limit your return on investment if you (34) choose a school or are ill-prepared to take (35) of its educational opportunities. The MBA is very different from many (36) graduate degrees, in which academic promise is (37) paramount in the admissions process. At a minimum, business school (38) officers consider career history and aspirations, evidence of leadership potential, and academic achievement. (39) the typical MBA candidate has several years of full-time, post-undergraduate work experience in a (40) capacity and can clearly articulate motivations for MBA study.
A good self-assessment process will help you establish specific career and education goals (41) utilize your strengths (42) address your weaknesses. Lacking specific goals, you will be searching (43) direction for a school. How will you eliminate options, much (44) make a choice you will be happy with in the end (45) will you determine whether the MBA experience was a good value Whenever you are considering major changes in your life, self-assessment can help you clarify your goals and make wise decisions.

A. opportunity B. aidC. MBA D. aspiration

单项选择题