英語第十一周測(cè)試題目

1、.英語：Plants and animals, including humans, need food and water to live on. These are from the natural resources(資源) on Earth. To protect these resources, we need to keep the air clean and the water drinkable. We need to keep the soil (土壤)healthy. How do we do that?Protect the landThe soil that covers

2、 fields and farms provides much of the food we eat. Human activities such as plowing(耕) fields, mining(采礦), and building highways can destroy (破壞)the land. Erosion happen when wind and water carry away the soil. Soil erosion can turn rich farmland into a desert wasteland. So does this mean we should

3、nt build a highway or plow a field? Of course not. But it does mean we might think about Earthfriendly ways of doing those things.Today farmers plow their fields in different ways to prevent erosion. They try to use less water for their crops. They keep animals from eating the growing grass in just

4、one area. Farmers also plant trees to prevent erosion from happening.Save the TreesAnother human activity that damages the land is deforestation(采伐森林). People take away a large number of trees from a forest. Millions of square kilometers of forest disappear each year. When this happens, many plants

5、and animals lose their places to live. They may die out, or become very few. Scientists havent even discovered all the living things in the forest. We may be losing some without even knowing they are there. Trees absorb (吸收)and use carbon dioxide (二氧化碳)when they make food. Environmentalists encourag

6、e careful management of the forests. They ask people to replant trees after they cut down the forest. Recycle, Reuse, ReducePeople throw a piece of paper into the wastebasket after using it. The paper becomes trash. Where does the trash go next? Much of our trash ends up in landfills(垃圾填埋地). They ta

7、ke up valuable land and sometimes pollute the water, air, and land around them. More than a third of the trash in landfills is paper. Recycling, reusing, and reducing what you throw away can cut down on the need for more landfills. In fact, we can recycle about eighty percent of household trash.()1.

8、 What does the underlined word erosion mean?A. Plowing fields and miningB. Cutting down trees and farming.C. Wind and rain carrying away soil. D. Building highways on the farmland.()2. Why do we need to save the trees?A. To discover more new trees every year.B. To encourage careful management of the

9、 forest.C. To take away a large number of trees from the forest.D. To keep good places for animals and plants to live in.()3. How much of the trash can we recycle?A. All the trash.B. Very little. C. One third.D. Four fifths.根據(jù)對(duì)話內(nèi)容，用方框中所給詞的適當(dāng)形式填空。teach, student, invent, himself, at, job, importance,

10、knowSchool education is very important and useful. Yet no one can learn everything at school and a teacher cannot teach his 1 everything they want to know.His 2 is to show his students how to learn. He teaches them how to read and how to think. So much more is to be learned outside school by the stu

11、dents 3 .It is always more 4 to know how to study by oneself. It is quite easy to learn something, but it is difficult to use it to solve problems. Great inventors do not get everything 5 school, but they still can 6 many things and change the world a lot.How can the inventors do all of this? One of

12、 the answers is: they 7 how to study. A lot of things are not taught in the classroom. They get a lot of knowledge by reading outside school. They work hard and never give up all their lives.科學(xué)：1.(2010年 桂林市30.6分) A、B、C、D、E是初中化學(xué)中的五種常見物質(zhì)。C、D是單質(zhì)，C為紫紅色固體，D被認(rèn)為是最清潔的能源。B的濃溶液常用做干燥劑。已知Fe和A、B的水溶液分別能發(fā)生反應(yīng)：Fe +

13、A C + E； Fe + B D + E 。（1）寫出A、B、C的化學(xué)式： A ， B ，C 。（2）現(xiàn)有Fe和A、C三種固體組成的混合物，小剛想測(cè)定該混合物中C物質(zhì)的質(zhì)量分?jǐn)?shù)，他設(shè)計(jì)并完成了以下實(shí)驗(yàn)：你認(rèn)為，小剛的實(shí)驗(yàn)數(shù)據(jù)處理是否正確（填“正確”或“ 不正確”） ，理由是 。2.（2010年 烏魯木齊市179分）物質(zhì)發(fā)生化學(xué)變化的前后，總質(zhì)量是否發(fā)生改變？是增加、減小還是不變呢？甲、乙、丙三位同學(xué)按下面的步驟進(jìn)行探究：（1）提出假設(shè)：物質(zhì)發(fā)生化學(xué)變化前后總質(zhì)量不變。（2）設(shè)計(jì)并進(jìn)行實(shí)驗(yàn)，甲設(shè)計(jì)的實(shí)驗(yàn)裝置和選用藥品如圖A所示，乙設(shè)計(jì)的實(shí)驗(yàn)裝置和選用藥品如圖B所示，他們?cè)诜磻?yīng)前后都進(jìn)行了規(guī)范的

14、操作，準(zhǔn)確的稱量和細(xì)致的觀察。寫出A、B兩個(gè)實(shí)驗(yàn)發(fā)生反應(yīng)的化學(xué)方程式： ， 。丙進(jìn)行了圖C所示的實(shí)驗(yàn)，在一根用細(xì)銅絲吊著的長(zhǎng)玻璃棒兩端，分別繞上粗銅絲，并使玻璃保持水平。然后，用酒精燈給a端銅絲加熱數(shù)分鐘。停止加熱后冷卻，他觀察到的現(xiàn)象是 ， 。（3）實(shí)驗(yàn)結(jié)論：甲認(rèn)為：在化學(xué)反應(yīng)中，生成物的總質(zhì)量與反應(yīng)物的總質(zhì)量相等；乙、丙認(rèn)為：在化學(xué)反應(yīng)中，生成物的總質(zhì)量與反應(yīng)物的總質(zhì)量不相等。（4）你認(rèn)為 的結(jié)論正確，請(qǐng)從原子的角度分析，結(jié)論正確的理由是： 。（5）導(dǎo)致其他實(shí)驗(yàn)結(jié)論錯(cuò)誤的原因是 ， 。因此，如果 的反應(yīng)，則一定要設(shè)計(jì)反應(yīng)在密閉裝置中進(jìn)行。數(shù)學(xué)：（2009瑞安中考模擬第24題）如圖甲，直角梯

15、形ABCD中，ADBC，BAD=B=90°，AD=AB=6cm，BC=8cm點(diǎn)E從點(diǎn)A出發(fā)沿AD方向以1厘米/秒的速度向終點(diǎn)D運(yùn)動(dòng)；點(diǎn)F從點(diǎn)C出發(fā)沿CA方向以2厘米/秒的速度向終點(diǎn)A運(yùn)動(dòng)當(dāng)點(diǎn)E、F中有一點(diǎn)運(yùn)動(dòng)到終點(diǎn)時(shí)，另一點(diǎn)也隨之停止設(shè)運(yùn)動(dòng)的時(shí)間為t秒（1）當(dāng)t為何值時(shí)，AEF和ACD相似？（2）連接BF，隨著點(diǎn)E、F的運(yùn)動(dòng)，四邊形ABFE可能是直角梯形若可能，請(qǐng)求出t的值；若不能，請(qǐng)說明理由？（3）當(dāng)t為何值時(shí)，AFE的面積最小，最小值是多少？英語：閱讀：1. C 2. D 3. D 詞匯：1. students 2. job 3. themselves 4. important 5. at 6. invent 7. know科學(xué)：1.（1）CuSO4 H2SO4 Cu （2）不正確 4.2g紫紅色固體中包含有鐵和硫酸銅反應(yīng)生成的銅（鐵和