阅读短文，回答问题．光的三原色让一束太阳光通过狭缝从一侧射到三棱镜上，光通过三棱镜折射后形成一条由红、橙阅读短文，回答问题． 光的三原色 让一束太阳光通过狭缝从一侧射到三棱镜上，光通过三棱镜折射后形成一条由红、橙、黄、绿、蓝、靛、紫等颜色组成的光带，这种现象叫光的______现象．人们发现用红、绿、蓝三种色光按不同比例可以混合成任何彩色光，如把红光和蓝光重叠地照在白墙上，你看到的就是品红色光；把绿光和蓝光重叠地照在白墙上，你看到的就是青光；把红光和绿光重叠照在白墙上，你看到的就是黄光．当三色光重叠地照在白墙上，你看到的便是白色．红、绿、蓝是色光的三原色，彩色电视机屏幕上丰富多彩的画面，就是由______的光叠合而成的． 颜料的三原色 各种颜料反射与自身一致的色光，还反射一些在光带上邻近的色光．例如黄颜料除了反射黄光之外，还要反射邻近的橙光和绿光；同样，蓝颜料除了反射蓝光以外，还要反射邻近的绿光和靛光．把黄颜料和蓝颜料混合在一起以后．由于黄颜料把红、蓝、靛、紫色光吸收掉了，蓝颜料把红、橙、黄、紫色光吸收掉了，反射光中就只剩下了绿色光．因此混合后的颜料看上去就是绿色的．颜料的三原色是红、黄、蓝．这三种颜料按一定的比例混合就能调出各种不同的颜色来． （）黄颜料除了反射黄光外，还反射橙光和______光；黄颜料和蓝颜料混合后是______色；两种颜料混合后呈现第三种颜色，请你用简短的语言表述其中的规律：______．

A . 红；蓝；紫；青；绿；黄；橙 B . 紫；青；蓝；绿；黄；橙；红 C . 橙；黄；绿；青；蓝；紫 D . 紫；橙；红；黄；绿；青；蓝

A . “有什么”“怎么样”是描写的基础，“像什么”是进一步的提升 B . “像什么”是区别描写好坏的关键 C . 描写的三原则可以有效地指导学生写作 D . “像什么”既包括对修辞的使用，又包括对词语的推敲

A . 黄光 B . 红光 C . 绿光 D . 白光

第一篇 Volunteers are being recruited(征募) to eat raw potatoes in the first human trials of a vaccine grown in genetically engineered vegetables. Researchers in Texas hope that people who eat the potatoes will be protected against common gut(肠，肠子) infections. They believe this technique could prove to be a cost-effective way of growing vaccines in developing countries where such diseases are still killers. Other researchers previously succeeded in using similar techniques to produce potential vaccines Now Hugh Mason and his colleagues at Texas A & M University(得克萨斯农业及机械大学) their plant vaccines on mice and plan to recruit 15 volunteers for a human trial. The team first tested the technique in tobacco plants. They took a strain of Escherichia coli(大肠杆菌) bacteria that causes food poisoning, and identified the part of the poison which binds to its victims gut cells. They then used a modified plant bacterium called Agrobacterium tumefasciens to transfer the segment of DNA which manufactures the binding protein into the tobacco plant. Under normal circumstances, these bacteria transfer packets of DNA into plant cells to force the plant to manufacture the nutrients they need. But in the modified bacteria, the DNA package includes the gene to pro- duce the binding protein. Once the foreign DNA segment was incorporated(结合，合并) into the tobacco's own DNA, the bacteria were killed off with antibiotics. Mason's team then grew these modified tobacco plants and found that they produced the E. coli binding protein. Proof of success came when the tobacco leaves were mashed up(捣碎) and squirted into the stomachs of mice. Mason says that within days the mice started producing specific antibodies to the E. coli poison, but suffered no ill effects from digesting the binding protein. Mason then produced genetically engineered potatoes and fed these to mice, with similar results. Mason's team have used plants to produce vaccines against a number of other infectious agents. For example, they have made a vaccine using a protein from the shell of the Norwalk virus, which causes diarrhoea(腹泻) in children. A third vaccine has also been produced in tobacco using a surface protein from the hepatitis B virus. But Mason says that so far they have only been able to produce small amounts of it in potatoes. Although a vaccine already exists against hepatitis B, a cheaper plant version could make mass immunisation(群众性免疫) possible. One problem with growing potatoes to produce vaccines is that cooking tends to destroy the protein component of the vaccine, so they must be eaten raw. Mason thinks that bananas may be a better option. "One banana could potentially produce a whole host of different vaccines," says Mason. The purpose of this text is______。 A. to prove that doctors don't like vegetables B. to amuse the reader by telling some funny things C. to describe how vegetables can grow vaccines for their own use D. to tell the reader about a cheaper way of growing vaccines

<img src='https://img2.soutiyun.com/ask/uploadfile/10842001-10845000/6e53c7c9b72af26333471f9a3c8c8459.gif' /> (1)观测地震波在地下不同深度传播速度的变化，可将地球内部分为三个圈层，图中A、B、C分别是______、______、______。 (2)在地上约60一250千米至400千米处存在一个软流层，这里的物质处于熔融状态。软流层以上的______和______组成了岩石圈。 (3)横波速度在地下2900千米处降为零，据此推测从这里到5000千米深处的特质接近(液、固)态。

材料一： 在有马镫以前，骑者的座位是不牢靠的。中国马镫西传，使得新作战方式成为可能，在这样一种西欧新社会形态中获得了表现：那个社会由武士阶级的贵族政治统治着，武士们被赋予土地，使他们能够以一种新颖而高度专门化的方法来打仗。这种贵族不可避免地要发展起和马上白刃战的风格及

阅读下面这篇短文，短文后有2项测试任务：(1)第23~26题要求从所给的6个选项 中为第2—5段每段选择1个正确的小标题；(2)第27~30题要求从所给的6个选项中选 择4个正确选项，分别完成每个句子。请将答案涂在答题卡相应的位置上。 Even Intelligent People Can Fail 1 The striking thing about the innovators who succeeded in making our modern world is how often they failed．Turn oil a light，take a photograph，watch TV,search the web，jet across the Pacific Ocean．talk on a cellphone(手机)．The innovators who left us these things had to find the way to success through a maze(错综复杂)of wrong turns． 2 We have just celebrated the 125th anniversary of American innovator Thomas Edison’s success in heating n thin line to white，hot heat for 14 hours in his lab in New Jersey，US．He did that on October 22．1879．and followed up a month later by keeping a thread of common cardboard alight(点亮着的)in an airless space for 45 hours．Three years later he went on to light up half a square mile of downtown Manhattan，even though only one of the six power plants in his design worked when he turned it on，on September 4，1882． 3 “Many of 1ife’S failures”the supreme innovator said．“are people who did not realize how close they were to success when they gave up”Before that magical moment in October 1879． Edison had worked out no fewer than 3．000 theories about electric light．But in only two cases did his experiments work． 4 N0 one likes failure，but the smart innovators learn from it．Mark Gumz．the head of the camera maker Olympus America Inc．attributes some of the company’S successes in technology to understanding failure．His popular phrase is：“You only fail when you quit” 5 0ver two centuries,the most common quality of the innovators has been persistence That is another way of saying they had the emotional ability to keep up what they were doing．Walt Disney,the founder of Disneyland，was so broke after a succession of financial failures that he was left shoeless in his office because he could not afford the US$1．50 to get his shoes from the repair shop．Pioneering Car maker Henry Ford failed with one company and was forced out of another before he developed the Model T Car． 6 Failure is harder to bear in today’s open,accelerated world．Hardly any innovation works the first time But an impatient society and the media want instant success When American music and movie master David Geffen had a difficult time，a critic said nastily that the only difference between Geffen Records (Geffen’s company)and the Titanic(the ship that went down) was that the Titanic had better music．Actually，it wasn’t．After four years of 10sses．Geffen had so many hits(成功的作品)he could afford a ship as big as the Titanic all to himself． <img src='https://img2.soutiyun.com/ask/uploadfile/2400001-2403000/cd31ff35bfc473fe95ed3d47d6bea39c.jpg' />

“姑娘跨进了门槛”象征什么？

阅读《伊豆的舞女》下列节选片段，参考三个提示写出一篇不少于450字的短文。 提示： （）从这段情节并联系全文看，“我”与舞女的感情性质是怎样的？ 要求：主要围绕所给的材料和提示进行综合分析，不能分别回答问题。观点鲜明，分析具体，条理清楚，语言通顺，书写整洁。 第二天早晨一过九时，那个男人就到我的房间来了。我刚刚起床，邀他去洗澡。南伊豆的小阳春天气，一望无云，晴朗美丽，涨水的小河在浴室下方温暖地承受着阳光。我感到自己昨夜的烦恼像梦一样。我对他说：昨天夜里你们欢腾得好晚啊。”“怎么，你听见啦？”“当然听见了。”“都是些本地人。这地方上的人只会胡闹乱叫，一点也没趣。”他作出若无其事的样子，我沉默了。“那些家伙到对面的浴场来了。你瞧，他们好像注意到这边，还在笑哩。”顺着他所指的方向，我朝河那边的公共浴场望去。有七八个人光着身子，朦胧地浮现在水蒸气里面。忽然从微暗的浴场尽头，有个裸体的女人跑出来，站在那里，做出要从脱衣场的突出部位跳到河岸下方的姿势，笔直地伸出了两臂，口里在喊着什么。她赤身裸体，连块毛巾也没有。这就是那舞女。我眺望着她雪白的身子，它像一棵小桐树似的，伸长了双腿，我感到有一股清泉洗净了身心，深深地叹了一口气，嗤嗤笑出声来。她还是个孩子呢，是那么幼稚的孩子，当她发觉了我们，一阵高兴，就赤身裸体地跑到日光下来了，踮起脚尖，伸长了身子。我满心舒畅地笑个不停，头脑澄清得像刷洗过似的。微笑长时间挂在嘴边。由于舞女的头发过于丰盛，我一直认为她有十七八岁。再加上她被打扮成妙龄女郎的样子，我的猜想就大错特错了

A．58&deg; B．32&deg; C．13&deg; D．28&deg;

A．展露微笑会让人留下美好印象 B．惊恐是对人类很重要的信息，它会提醒人们注意潜在的危险 C．对于没有什么危险的信号，大脑相应的关注也较少 D．文中未给出确切答案

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