It might be very difficult to find the ____ of the information. [ ]A. cause B. resourceC. source D.

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• — He says that my new car is a ___ of money.— Don't you think those words are just sour grapes?
• Some of the____on this siteexpresses viewpoints and opinions that are not those of TheRecording Acad
• In an attempt to save money,somehousewives like to go from shop to shop to search forreal____.[ ]A c
• Susan is on a special _____ to lose weight.[ ]A. foodB. dietC. mealD. dinner-高一英语
• 单词拼写。1. It is said that the vase they found yesterday dates back to the Ming _______________ (朝代)2.
• —Do you think the rain will affect the results of the football game?— Well, the players are used to
• Considering the severe fact of global warming, the top _____ of all nations is to reduce CO2 emissio
• The _____ of the trees in the water was very clear. [ ]A. mirror B. sight C. reflection D. shadow -高
• The great _____ of this computer is that it's so cheap compared to the others. [ ]A. power B. s
• There is a growing _____ to regard money more highly than quality of life.[ ] A. tendency B. flood C
• Cheating at the game ruined that player's____. [ ]A. name B. prize C. reputation D. appearance
• The suspect's fingerprints on the gun were the main _____against him. [ ]A. crime B. informatio
• The farmers in that area are in a terrible ______ because of the water shortage. [ ]A. direction B.
• — Was the proposal passed at yesterday's meeting? — Yes, but some members at the committee expr
• Exploring the moon is a(n) _____ to China as well as the whole world. [ ]A. opportunity B. challenge
• —＄1,500, but that's my last offer. — Ok. It's a ____. [ ]A. costB. priceC. reward D. deal
• The vote for the suspension(中止) of the meeting was 283 in _____with 29 against. [ ]A. demand B. need
• The top leaders of the two countries are holding talks in a friendly ______. [ ]A. atmosphere B. sta
• Life is a _____, meet it! Life is a dream, realize it! Life is a game, play it! [ ]A. challenge B. d
• In order to promote its brand, Harvard University has put a lot of money and time to launch an adver
• Despite such a big different in the _____towards what one eats, there is no doubt that people in the
• Walk to work every day and you'll soon be back in _____. [ ]A. situation B. conditionC. positio
• Due to the widespread _____ of this medical technology, more disease can be discovered and treated a
• I had only a few _____ with Miss Gao, though we work in the same school. [ ]A. laughter B. handshake
• All the employees of the company received a(n) _____ of $ 200 apart from their salary at the end of
• I know the man by ____ but I have never spoken to him. [ ]A. chance B. heart C. sight D. experience
• Recently tourism has a great _____ on the wildlife in my hometown, which causes complaints. [ ]A. ef
• 苍耳果实表面的钩刺可以挂在动物的皮毛上，这样有利于[]A．扩大分布范围B．躲避不良环境C．进行光合作用D．进行呼吸作用-八年级生物
• 大部分动物在生态系统中扮演的角色是[]A．生产者B．消费者C．分解者D．什么都不是-八年级生物
• 常言道：蛛丝马迹。这说明蛛丝十分纤细，但是科学研究又发现蛛丝非常坚韧。蛛丝有黏性，当昆虫不慎落入蛛网被黏住后，进行挣扎时，藏在隐蔽处的蜘蛛会立即爬上蛛网，将昆虫抓-八年级生物
• 蝗虫危害庄稼，所以应剿灭蝗虫。[]-八年级生物
• 消灭棉花上的蚜虫最好的方法是[]A．喷洒低浓度的农药B．喷洒高效的农药C．放养七星瓢虫D．哪一种都可以-八年级生物
• 有一种叫鬼针草的植物，当动物在草丛中行走时，身上常被沾上一些带刺的“针”，动物在这一过程中起的作用是[]A．帮助鬼针草传播种子B．毁坏了鬼针草C．贮存了食物D．调节了生态平衡-八年级生物
• 下图为农田生态系统中蛇和鼠数目的动态变化平衡示意图，依图回答问题：（1）如果人类大量捕捉蛇，田鼠的数量将。（2）生态系统中各种生物的数量和所占的比例总是维持在相对稳定的-八年级生物
• 动物能够帮助植物，使这些植物顺利地繁殖后代。动物能够帮助植物和传播，有利于扩大植物的分布范围。当某些动物过多时，也会对植物造成危害。-八年级生物
• 20世纪50年代在婆罗洲的许多雅克人身患疟疾，世界卫生组织采取了一种简单的也是直截了当的解决方法：喷洒DDT。蚊子死了，疟疾也得到了控制。可是没多久，大范围的后遗症出现了-八年级生物
• 首次在世界范围内引起人们对野生动物的关注，唤起人们的环保意识的一本书是[]A．《我的野生动物朋友》B．《昆虫记》C．《寂静的春天》D．《神秘的动物王国》-八年级生物
• 蜜蜂的足上有适于采集花粉的花粉筐，并以花粉酿蜜作为食物，有的植物的花能产生大量的花粉，并借助一定形态结构吸引蜜蜂为之传粉。这些事实说明（1）蜜蜂能帮助植物传粉，使这-八年级生物
• 20世纪50年代在婆罗洲的许多雅克人身患疟疾，世界卫生组织采取了一种简单的也是直接了当的解决方法：喷射DDT。蚊子死了，疟疾也得到了控制。可是没多久，大范围的后遗症出现了-八年级生物
• 一个有趣的实验现象：在某牧场，科研人员为了防止鸟吃草籽，有人把人工种草的试验区用网子罩起来。过一段时间发现，草的叶子几乎被虫子吃光了，而未加罩网的天然草原，牧草却-八年级生物
• 下列哪项不属于生物防治[]A．以农药治虫B．以虫治虫C．以鸟治虫D．以菌治虫-八年级生物
• 在农田生态系统中，其中的两条食物链如下图所示，如果大量捕食青蛙，造成的严重后果是[]A．蛇的数量大大增加B．虫害严重，水稻减产C．老鼠大量增加为害粮食D．青蛙减少，维持了生-八年级生物
• 棉蚜是一种专门危害棉花的蚜虫，长期使用杀虫剂会使棉蚜产生抗药性，人们增加农药的使用量更会污染环境。生物防治是利用生物来防治病虫害的一种方法。请你设计一个以虫防虫的-八年级生物
• 动物在生态系统中的重要作用是[]A．促进生态系统的物质循环B．把水和二氧化碳等无机物合成有机物C．分解动植物的尸体或残骸，把有机物转变为无机物D．吸收空气中的二氧化碳-八年级生物
• “臭名昭著”的四害：苍蝇、蚊子、老鼠、臭虫，因为其传播疾病，为非作歹千百年来一直遭受到了唾弃，“老鼠过街，人人喊打”等反映了人们的心声，但是近几年有人却说：他们也是食物-八年级生物
• 下图是某生物兴趣小组对一个农田生态系统做调查之后，所绘制的食物网简图。请据图回答问题（1）在该生态系统中有条食物链，其中最长的食物链中有种生物。（2）从生态系统的组成成-八年级生物
• 下列不属于动物在自然界中的作用是[]A．通过食物网来维持生态平衡B．促进生态系统的物质循环C．用于观赏D．帮助植物传粉、传播种子-八年级生物
• 下列不属于生物防治的是[]A．苏云金杆菌杀棉铃虫B．白僵菌杀松毛虫C．用粘蝇纸捕杀苍蝇D．瓢虫捕杀蚜虫-八年级生物