题干

如果一个物体能反射所有色光,则该物体呈现____ 色;在暗室里用一束绿光照射一朵红花,则该花呈现____ 色。

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白,黑

同类题1


Spring is coming . The flowers will start blossoming (开花)and the trees will be filled with colors. It’s time of the year for people to plant trees. Planting trees is a good way to protect our environment. But most of us don’t have a place to plant trees. So what can we do for protecting the environment? We can make a difference from the others. For example, we can think about a way to make people cut down fewer trees. As we know, paper is made from trees. If we use less paper, we can save a lot of trees. Then we may have a problem that how to use less paper. Let me tell you my ideas.                                                   
Reducing Our Paper Waste
Every day we just use the paper and we don’t think about where the paper comes from.Let us think about wasting a piece of paper is like wasting a tree. We can start with reducing the amount of paper products that we use. This could be done by such a simple way as using e-mail instead of writing notes.
Reusing

We could reuse paper that is clean on one side for drafts, notes and even photocopies. As students, we could reuse paper by doing our research online or at libraries rather than buying lots of written paper. Sharing books or buying a used textbook for school is another way of reusing.
Recycle
We should consider recycling notebook paper, newspapers, magazines and colored paper. We can buy paper towels, tissues, and toilet paper that have been made from recycled paper. Don’t throw away the wasted newspapers or books which are not useful to you.
       

 

同类题4

阅读下面的文字,完成下列各题。

紫阳腰

方英文

    周末无事,车游紫阳。小时候就喝紫阳茶,年至半百竟未去过紫阳,不够意思啊。紫阳在汉江边上,猜想是很通达很便捷的。没想到实在难走!坡陡弯急,一山爬过又一山,好在翠色染目白云亲颊,别有一番俗外之雅呢。翻过三座山,眼底终于浮出一个城,火车的闹,船笛的叫,顿时没了清净。细看紫阳县城,果然是重庆的浓缩,看不见碟子大的平地。怎么办?山腰上凿一个凹,凹处凸起一栋楼。就这么锛石凿凹,就这么起房凸楼,硬是在夹江的山腰上,锛凿叠垒了一个城。所谓的码头城市,压根不在乎有无平地,但求两河交汇,能把舟楫勾留缠绵住就好。浩浩任河,正是在此融入汉江的。

    想不出如此一个城怎么生活,大概吵架也拉不开距离吵着吵着就勾肩搭背了,干活时则又需要捆上安全绳吧。待到进得城里,但见街道逼仄车辆单行,却也店铺比邻,色彩炫耀嗅觉缤纷。及至日落西江夜色袭来,忽见城灯哗然绽放。时值秋老虎季节,人们简上衣而短下裤,为的是让胳膊腿儿尽可能地吐热纳凉。尾随人流浪进商场,再踏梯而上,发现商场顶部竟是一个很大的广场。如此叠屋架床式的建造格局,简直一个香港袖珍版!顺音乐声溜达过去,见人们围一个圈子。圈外踮脚看圈里,呵呵,一群女子练健美操哩。她们抛甩着纤媚的臂腕,扭动着柔细的腰肢,展示着风致的身段;脚一跺,腰一侧扭,臂一斜扬,头发就抛上月亮了

    夜里看一个资料,上面说:“紫阳腰,汉阴脚,安康女子爱做作,要看水色下白河。”紫阳、汉阴、安康、白河,是安康所辖的四个县名。当然安康如今叫市了。人生之美,十之八九由女性呈现,所以每一个地方,都把当地女性美的特点,以歌谣的形式提炼出来四处传播。而女性美的具体表现,当然是以身段最为紧要。身材之标致婉约,则绝对依赖腰肢的拿捏烘托,如此才叫一个动人。何以动人呢?细柔也。紫阳娘们何以生出如此之腰呢?

    次日早起遛街,似乎得了答案。总是遇见一些女子挑着扁担,忽忽闪闪地来了,忽忽闪闪地去了。两个担笼里,是白嫩的豆腐,是带露的青椒,是拖泥的新藕,是出江的鲜鱼。忽闪忽闪而来,营养于客官;忽闪忽闪而去,生计于家庭﹣﹣终于忽闪出一腰的风情与柔韧。

    返回时选了一条新路,更觉得这个汉字“腰”,似乎是专为紫阳所造。路是依旧忙着拓,车是依旧不住地停。好在村村通了水泥路,绕道便是。实际上无村可言,因为紫阳人家,一概散布于山之腰岭之凹。那些粉墙青瓦或者石板房,如一栋栋达官名流的别墅,落座于青坡,半隐于绿峦,恰如次第展开的山水长卷,新意频出却也可四字概括﹣﹣山腰人家啊!坡是这么陡,劳动的间歇,估计站着就能睡着,反正躺着跟站着没啥两样。如此之地,竟不时见到三五块石头拦一巴掌小塘,居然就荷叶田田蜂蝶频访了呢。至于竹子,此等俊逸灵秀之物,更是家门掩映垂瓦叩窗。所以这里的狗不咬人只摇尾,充分体现了淡泊无争的“竹下之风”。然而有些却是要争一争的!于是,山腰上长大的女子和汉子们,就人人成了好歌手。

    紫阳一名,出自道家。道家是中国唯一固有的宗教,汉江是汉文化最核心的源泉之一。道家以水为善,以茶为慧,以山为美,以歌为雅。落日岭上,渔火江中,朝晖夕阴大自在,不知功名利禄为何物。紫阳和紫阳人有如此怀柔万物和谐自然的情致,真是难得啊!

(选文有改动)

同类题5

阅读理解

       Does stress cause gray hair?Many people believe that tension and stress can cause your hair to lose its color.In fact,it is an_old_wives’_tale that being upset all the time can result in premature graying.Here is a closer look at this situation and why some believe that this old wives’ tale could be true.

       As one ages,the hairs on the head also age.In fact,just about everything on the human body begins to show signs of wear and tear after a while.The joints wear and become stiff and skin wears and becomes wrinkled.Hairs on the head grow and eventually die.They are replaced,but in the process something else happens.

      When new hairs are replaced,the color or pigment (色素) is also added to them.However,as one ages,this pigment becomes less and less available.At first,hairs will have a limited amount of pigment and they will appear to be grayish in color.In time,they will lose all of their pigment and will be white.Many things are known to cause graying,and genetics is a very powerful factor.If one of your parents turns gray at an early age,there is a good chance that you will too.Some people begin the graying process in high school,while others may be over the age of forty.

      Constant worry and tension can have many harmful effects on the human body.It is a known fact that stressful times can cause one to suffer hair loss.It would make sense that if it can cause these problems,perhaps it also may contribute to graying.However,there is no sound evidence to support this.

       On the other hand,many medical professionals believe that there may be a link between graying and a constant state of anxiety or tension.Does stress cause gray hair?There is no scientific evidence to support the theory,but it is best to avoid stressful situations.