A.电子设备将得到全面更新不再使用电线连接
B.量子棘轮上的电子能在不同电器元件间跳跃
C.只要经过随意分流的电子就能储存量子信息
D.量子棘轮将应用于新一代量子计算机的研制
A.借助无有向电压的电子设备可使电子定向分流
B.具有转圈、上下乃至爬波等多种电子运动形式
C.通过特定信号控制电子的流向以完成有用运动
D.将促进物理学、生物化学等学科的研究与发展
15.下列表述符合原文意思的一项是:(2分
A.世界上最长、最快的高速铁路干线是武汉到广州的高铁客运专线。
B.世界各国都在大力推进铁路的高速化,旨在减少废气排放,节约石油资源。
C.从武汉到广州,如果你坐在“和谐号”列车六号车厢,那么,你就是坐在动车车厢内。
D.为了防止高速列车行进在弯道时造成脱轨事故,在路轨的设计上采取了尽量提高PQ值的技术措施。
16.第⑤至⑨自然段介绍了高速铁路的特别要求,其中⑦至⑨三段各介绍了哪一个方面的要求?(3分
17.第③段中的画线句子运用了哪些说明方法?有什么作用?(3分
18.高速铁路“将改变人们的地理概念和生活方式”。高铁现已修到我们家乡,它将给我们的生活带来哪些新的变化?(至少答出两点(3分
Last Sunday, Jim went out to fly a kite. The kite flew highly in the sky. Jim ran with it happily.
Suddenly the line was broken and the kite flew away. Soon it disappeared. Where was it?
Jim had no idea. So he had to run here and there to look for the kite. At last he saw it on the top of the tree. He tried to get it down. But he couldn’t. He felt sad.
A.分子马达协调运作使其吸收的无方向能量成为定向能量以满足人体需要
B.众多的分子马达协调运作使肌肉产生有效能量以适合人体各部分的需要
C.肌肉在周期力的作用下完成有用的单向运动以抵消体内能量的无方向性
D.肌肉将吸收的无方向化学能量进行改造再释放以补充人体所消耗的能量
1.不能。因为“唯一的”即“独一无二”,准确地说明了要改变这种困难,除找到既环保又可再生的替代性能源外,别无他法。
2.因为氢燃烧后产生的是水,而这种水对自然界完全无污染,所以氢动力汽车可以实现“零污染”。
3.①科技的发展和巨大市场利润的刺激;②石油面临枯竭的威胁,汽车终有一天会无油可有;③氢既环保又可再生;④氢无处不在
4.中心句是:氢能源的开发技术是氢动力汽车最终走进寻常百姓家的关键。
1。 叙述的人称
英语的记叙文一般是以第一或第三人称的角度来叙述的。用第一称表示的是由叙述者亲眼所见、亲耳所闻的经历。它的优点在于能把故事的情节通过“我”来传达给读者,使人到真实可信,如身临其境。如:
The other day, I was driving along the street。 Suddenly, a car lost its control and ran directly towards me fast。 I was so frightened that I quickly turned to the left side。 But it was too late。 The car hit my bike and I fell off it。
用第三人称叙述,优点在于叙述者不受“我”活动范围以内的人和事物的限制,而是通过作者与读者之外的第三者,直接把故事中的情节展现在读者面前,文章的客观性很强。如:
Little Tom was going to school with an umbrella, for it was raining hard。 On the way, he saw an old woman walking in the rain with nothing to cover。 Tom went up to the old woman and wanted to share the umbrella with her, but he was too short。 What could he do? Then he had a good idea。
2。 动词的时态
在记叙文中,记和叙都离不开动词。所以动词出现率最高,且富于变化。记叙文中用得最多的是动词的过去的',这是英语记叙文区别于汉语记叙文的关键之处。英语写作的优美之处就在于这些动词时态的变化,正是这一点才使得所记、所叙有鲜活的动态感、鲜明的层次感和立体感。
3。 叙述的顺序
记叙一件事要有一定的顺序。无论是顺叙、倒叙、插叙还是补叙,都要让读者能弄清事情的来龙去脉。顺叙最容易操作,较容易给读者提供有关事情的空间和时间线索。但这种方法也容易使文章显得平铺直叙,读起来平淡乏味。倒叙、插叙、补叙等叙述方法能有效地提高文章的结构效果,让所叙之事跌宕起伏,使读者在阅读时思维产生较大的跳跃,从而为文章所吸引,深入其中。但这些方法如果使用不当,则容易弄巧成拙,使文章结构散乱,头绪不清,让读者不知所云。
4。 叙述的过渡
过渡在上下文中起着承上启下、融会贯通的作用。过渡往往用在地点转移或时间、事件转换以及由概括说明到具体叙述时。如:
In my summer holidays, I did a lot of things。 Apart form doing my homework, reading an English novel, watching TV and doing some housework, I went on a trip to Qingdao。 It is really a beautiful city。 There are many places of interest to see。 But what impressed me most was the sunrise。
The next morning I got up early。 I was very happy because it was a fine day。 By the time I got to the beach, the clouds on the horizon were turning red。 In a little while, a small part of the sun was gradually appearing。 The sun was very red, not shining。 It rose slowly。 At last it broke through the red clouds and jumped above the sea, just like a deep-red ball。 At the same time the clouds and the sea water became red and bright。
What a moving and unforgettable scene!
5。 叙述与对话
引用故事情节中主要人物的对话是记叙文提高表现力的一种好方法。适当地用直接引语代替间接的主观叙述,可以客观生动地反映人物的性格、品质和心理状态,使记叙生动、有趣,使文章内容更加充实、具体。试比较下面两段的叙述效果:
I was in the kitchen, and I was cooking something。 Suddenly I heard a loud noise from the front。 I thought maybe someone was knocking the door。 I asked who it was but I heard no reply。 After a while I saw my cat running across the parlor。 I realized it was the cat。 I felt released。
这本来应是一段故事性很强的文字,但经作者这么一写,就不那么吸引人了。原因是文中用的都是叙述模式,没有人物语言,把“悬念”给冲淡了。可作如下调整:
I was in the kitchen cooking something。 "Crash!" a loud noise came from the front。 Thinking someone was knocking at the door, I asked, "Who?" No reply。 After a while, I saw my cat running across the parlor。 "It's you。" I said, quite released。
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