题干

下列细胞中的化合物与其功能描述相符的是(  )

A:无机盐﹣储存能量

B:结合水﹣良好溶剂

C:糖类﹣主要能源物质

D:RNA﹣储存遗传信息

上一题 下一题 0.0难度 选择题 更新时间:2019-11-30 10:19:48

答案(点此获取答案解析)

C

同类题2

阅读理解

    “Image is everything.” An entire industry has been built upon the concept that image is everything, but an appealing image isn't enough when there's no substance behind it.

    First of all, one should consider how important image is in selling products and services. Advertising agencies have raised the art of creating an image to a state of near perfection. But if the product or service doesn't live up to it, customers will be very dissatisfied. The recent scandal (丑闻) about the Arthur Andersen accounting firm showed that behind that image, it had unfair business practices under the table. Despite the previous positive image, the firm is being accused of criminal actions. Although the image had been nearly perfect, the reality behind the image has led to its downfall.

    Similarly, personal consultants(顾问) can build up a very positive public image for politicians and movie stars in the view of the general commons. But once again, history is filled with examples of both that fell from grace (体面) like the story of the Hollywood actor giving in to the pressures of fame and fortune. With people, just as with products and services, image is certainly important, but without positive substance behind it, failure is close.

    To conclude, it's clear that an appealing image is extremely important to success, whether that image is related to selling a product or service or to the “selling” of a person. But image is only half of the equation(等式). What lies behind that image is every bit as important as the image itself — the person or product must live up to that image or there's little chance for long-term success.

同类题4

阅读下文,完成(1)~(6)题。

和老妈过招

          ①老妈89岁,正在人生的第二个童年时期,又活泼又率真。我正当中年,精力充沛。可是别以为在耄耋老人的面前你就很强大,和老妈过招,胜算几何呢?

          ②老妈住在我家朝阳的大南屋,家庭公共电视在她的屋里。晚上老妈总是很早吃饭,很早睡下。老妈说:“丫头啊,我睡我的,你看你的,我听不见电视的声音,一点儿也不影响我。”为着诚恳的缘故吧,老妈又说:“听话啊,我的老丫头,你看吧,愿意看到什么时候就看到什么时候。”

          ③老妈真好,事儿真少,不像我有些同学或朋友的老妈,事儿多。我于是服侍老妈睡下,然后回到沙发上看电视。没看上半小时,老妈高亢的声音从我身后传来:“丫头啊,别看了,这灯光晃得我心里闹腾得不行了。”因为声音太过突然,我打个哆嗦,手中的遥控器跌落在沙发上。打完哆嗦,我赶紧关电视,关灯,关门,乖乖地退出老妈房间。

          ④我另有两个房间,每间里都有电脑,坐在电脑前琢磨:老妈lì害呀,不受委屈。我心里很安慰,这个回合我输掉了,但是高兴。

          ⑤老妈每天都要问我一个问题:“百合有电话吗?”百合是我女儿,在北京念大二。老妈耳朵背,我附耳回答:“有电话。”过不了多久,老妈又问:“百合有电话吗?”有时我忙着别的事情,有时心里被问得厌烦,就不到她的身边附耳回答了,而是先在脸上堆出笑来,口型做得大大的,表示“有”。耶!老妈居然看懂了,高高兴兴的样子。这样一天下来老妈对这个问题又问了七八遍,我就笑呵呵地回答了她七八遍。可能问到第九遍时,我趋近附耳向她质疑:“妈,您都问了我一千遍了呀。”老妈眼都不眨一下说:“哪有呢,我也就问了八百遍罢了。”

          ⑥我哈哈大笑,老妈真调皮啊。这个回合我输得甘心。

          ⑦一天,老妈左侧髋骨突然疼痛,自言快疼哭了。推老妈去医院拍片子,医生说骨质疏松。按照医嘱,系统补钙,喝奶,吃药,静养。为了防止出现意外骨折,我买了坐便椅,不许老妈再去卫生间。这样过了几天,老妈的腿依然疼痛难忍,面部常有痛苦不堪的表情。又过了些日子,老妈平时端坐还好,稍微运动时,表情依然痛苦,躺下歇息的时候,连毛毯都不能自己盖了。我真的很急啊,可是灵感在此刻也出现了。我躲在屋外,偷窥老妈,有巨大收获。老妈独自一人的时候。居然能够比较自如地坐到坐便椅上解决问题,也能自己很轻松地盖好又轻又暖的毛毯。做这些的时候,老妈十分平静安详。

          ⑧这一次,老妈当着我面微微行动时,又说疼啊疼啊,表情显得很痛苦不堪。我俯身贴耳揭她老底:“老妈,没有那么疼吧,你其实不怎么疼啊!”老妈仰脸看着我,脸上换上一种如孩童般被揭穿真相的纳罕和羞赧,说:“你怎么知道的啊?”

          ⑨这个回合我赢了,可是呆呆地想了想,又何必揭穿老妈呢?老妈够可怜的啦,她心里不知道有多害怕和无助呢。我把老妈搂在怀里,很是羞愧,于是这个回合我还是输掉了。

          ⑩其实,我知道母女之间哪有输赢呢,或者换句话说,我输了,也就是我赢了。

                                                                                                                                                                                            【注】纳罕:诧异,惊奇。