【甲】

       陈胜曰：“天下苦秦久矣。吾闻二世少子也，不当立，当立者乃公子扶苏。扶苏以数谏故，上使外将兵。今或闻无罪，二世杀之。百姓多闻其贤，未知其死也。项燕为楚将，数有功，爱士卒，楚人怜之。或以为死，或以为亡。今诚以吾众诈自称公子扶苏、项燕，为天下唱，宜多应者。”吴广以为然。乃行卜。卜者知其指意，曰：“足下事皆成，有功。然足下卜之鬼乎？”陈胜、吴广喜，念鬼，曰：“此教我先威众耳。”乃丹书帛曰：“陈胜王”，置人所罾鱼腹中。卒买鱼烹食，得鱼腹中书，固以怪之矣。又间令吴广之次所旁丛祠中，夜篝火，狐鸣呼曰：“大楚兴，陈胜王！”卒皆夜惊恐。旦日，卒中往往语，皆指目陈胜。

（节选自《史记·陈涉世家》）

【乙】

       宋狄武襄青^①征侬智高^②，大兵出桂林，道旁有一庙，人谓其神甚灵。武襄驻节而祷之，祝曰：胜负无以为据。乃取百钱自持之，与神约，果大捷则投此期尽钱面^③也。左右谏止，倘不如意恐阻师。武襄不听。众方耸视，挥手一掷，百钱尽红。举军欢呼声震林野武襄亦大喜。顾左右取百钉随钱疏密布地而钉帖之，加青丝笼覆，手自封焉。曰：“俟凯旋，当谢神取钱。”其后破昆仑关，败智高师，还取钱与幕府士大夫共视之，乃两字钱也。

（选自孙能传《益智编》）

【注释】①狄武襄青：狄青，北宋名将，谥号“武襄”。②侬智高：人名。 ③钱面：明代以前铜钱仅一面有文字，称面。

— Where are Maria and Kangkang?
—They _____ England.

电源《阿凡达》中的发光植物为我们打造了一幅绚丽、梦幻的外星世界景观．现在，这种会自发光的植物已经被科学家带到了现实生活中．据报道，美国科学家近来利用生物技术成功培育出了名为“星光阿凡达”的发光烟草，它甚至可以代替灯泡来照明．

（1）科学家将海洋发光细菌的DNA片段引入烟草中，对野草进行了基因改良，使其能够自然、主动、持续的发光，这种技术称为____ ．

（2）自发光是烟草通过生物技术获得的性状，说明生物性状受____ 控制．

（3）烟草花色的红色和黄色是一对相对性状．红花烟草和黄花烟草杂交，后代全部是红花烟草（如图）由此判断____ 是显性性状．

（4）烟草花叶病毒能够引起烟草叶出现黄绿相间的病斑，即烟草花叶病．该病毒结构简单，仅由蛋白质外壳和RNA（核糖核酸）组成．以下是烟草花叶病毒浸染烟叶的实验：

烟草花叶病毒烟叶烟叶出现病斑烟草花叶病毒

烟草花叶病毒的蛋白质外壳烟叶正常烟叶无烟草花叶病毒

烟草花叶病毒的RNA烟叶烟叶出现病斑烟草花叶病毒

以上实验结果说明：烟草花叶病毒的遗传物质是　____ ．

（5）如果烟草花叶病毒浸染“星光阿凡达”发光烟草．理论上发光烟草是否会感染烟草花叶病？____ 

       Computers can injure you. Most other injuries happen suddenly. For example, if you fall off a bike and break your arms, it happens very quickly. But computer injuries slowly.
　You probably know how to ride a bike safely. Now learn to use a computer safely.
Your eyes
　Too much light can injure your eyes, so never sit too close to a computer screen. Your eyes should be at least 50 centimeters from the screen. Remember to look away from it sometimes. This gives your eyes a rest.
　When you use a computer, the window should be on your left or your right. If it is behind you, the light will reflect on (反射) the screen. If the window is in front of you, the sun and the screen will both shine into your eyes.
Your hands and wrists (手腕)
　　Hand and wrist injuries can happen because the hands and wrists are moved in the same way hundreds of times. If you use a keyboard for a long time, follow these three rules: 1) Rest your wrists on something. 2) Keep your elbows (肘部） at the same height as the keyboard. 3) Stop something and exercise your hands, wrists and fingers in a different way.
Your back
　　Some people sit for many hours in front of a computer. If you sit in the wrong way, you can injure your back or your neck. So you should sit with your back straight. The top part of the screen should all be in front of your eyes. Your forearms（前臂）, wrists, hands and the upper（上部） part of your legs should all be parallel (平行) to the floor. If you are sitting for a long time, get up every 30 minutes and exercise your arms, legs and necks.
　Enjoy your computer, but use it safely.