1、1 课时分层作业(十五) .阅读理解 A Do plants listen to music? How can a plant possibly respond to music? Well， plants breathe through their many mouths， which are also known as stomata and it has been discovered that plant stomata respond to music! A few years ago， scientists at the University of California， San
2、Diego discovered what controls a plants stomata.The two cells that form the stoma consist of specialized cells adjusted to the resonant(共鸣的)frequency of calcium(钙)When exposed to this frequency the stomata close.However，if the frequency isnt exactly right the cells will open again within an hour.Thi
3、s happens even if the concentration of calcium is high enough that the stomata would normally close. When specific music or bird songs cause the plant to vibrate(颤动)， but not at the exact frequency for calcium resonance，the stomata will open after a misjudgment of time，even though the plant would ke
4、ep them closed under normal circumstances. Testing has shown that a leaf fertilizer(肥料)applied to the plant will have more effect on the development and growth of the plant if its stomata are wide open.This is quite logical ， because plants absorb the leaf fertilizer through their stomata.Combinatio
5、ns of frequency and leaf fertilizer are available for many different crops.However，if the stomata are forced to remain open，the plant wont be able to control the amount of water lost and so it risks dehydration(脱水)As a result， exposing plants to music for over 3 hours a day could endanger their heal
6、th.There could also be bad effects on plants if the volume or frequency is too high. It isnt exactly clear how music influences the development and growth of plants，but more and more is being discovered about resonance physics and were closer than ever to solid scientific proof and theories in this
7、area.Maybe，in twenty years time people will laugh if you say plants dont have ears! 【语篇解读】 本文是一篇科普文。主要介绍了音乐对植物的影响。 1Why does the author ask the questions in Paragraph 1? ATo express his doubts. 2 BTo present different ideas. CTo describe the lifestyle of plants. DTo introduce points for discussion.
8、D 推理判断题。根据文章第一段中的“it has been discovered that plant stomata respond to music”以及下文内容可以推断，作者在文章首段提出那两个 问题是为了引出本文要讨论的主题。 2What does the underlined word “This” in Paragraph 2 refer to? AThe reopening of the cells. BThe change in frequency. CThe frequency of calcium. DThe closing of the stomata. A 代词指代题。
9、 根据上下文内容可知， 画线词是指代上文提到的“the cells will open again”这一情况。 3It call be inferred from the text that . Afuture plants are likely to have ears Bhow music affects plant growth is widely known Cgrowers must be careful when exposing plants to music Dthe stomata dont affect the effect of leaf fertilizer on pl
10、ants C 推理判断题。 根据文章第四段内容可知， 如果让植物长时间地暴露在音 乐环境中或者音乐的音量或频率过高，会对植物产生不良的影响，如植物会脱水 等。由此可以推断，种植者在让植物暴露在音乐环境中时必须小心。 4Which can be the best title for the text? ABenefits of Music to Plants BInfluence of Music on Plants CHow to Improve Plant Growth? DHow Do Plants Listen Without Ears? B 标题归纳题。通读全文可知，本文主要讲音乐能够
11、促进植物的生长，但 是如果让植物长时间地暴露在音乐环境中或者音乐的音量或频率过高， 反而会对 植物产生不良的影响。由此可知，B 项“音乐对植物的影响”最能概括本文的内 容。 3 B My first term at MIT(麻省理工学院)was awesomeI got all As， and I declared math as my major.My parents were expecting me to become a doctor like them so I was trying to satisfy them.But I was desperately running away
12、 from them.I had no idea what I wanted to do with my life.My third term，I ended up with a D in math.I didnt do that well in my other classes，either.It seemed like all my friends were doing so well，getting opportunities over the summers. My fifth term，I realized that I was awful at higher- level math
13、.I had lost all confidence in myself.I went to a few classes at the beginning of the term，but after by midterm，I had totally stopped.My only relief was the dance team I was on.I would sleep all day，and then go to dance practice，and then go back to sleep.As expected， I failed in all of my classes and
14、 had to withdraw from MIT. I had no choice but to tell my parents.Instead of yelling or hitting me，though， they just held me and cried.The next day，my dad took a day off from work and took me to a nearby，small arts college. I had lost all confidence in myself.Before my first biology test，I didnt thi
15、nk I could pass.I did pass.Since I had so much free time，I decided to join a biology lab.I realized that was what I wanted to do! I wanted to be a scientist! This past May，I graduated with the highest honors，and now I have my PhD in biology.Though it ended up taking me 5 years to graduate from colle
16、ge， I can say now that dropping out of MIT was one of the best things that ever happened to me.Ive realized that a person is not their grades.Ive realized how much my parents loved me.Ive finally discovered my passion(热情)in life! 【语篇解读】 短文讲述了一名麻省理工学院学生在退学后又经过努力，找 到自己的兴趣和目标的故事。 5How was the authors f
17、irst term at MIT? AHe was busy with exams. BHe knew his goals clearly. CHe did well in all subjects. DHe was fed up with math. C 细节理解题。由一段中的“My first term at MIT(麻省理工学院)was 4 awesomeI got all As”可知，我在麻省理工的第一学期成绩非常棒所有的 科我都得了 A。所以作者第一学期各科成绩很好。故 C 选项正确。 6How did the authors parents react to his failing
18、 at MIT? AThey hit him. BThey yelled at him. CThey quit their jobs to teach him. DThey forgave him for what he did. D 细节理解题。 由第三段中的“Instead of yelling or hitting me， though， they just held me and cried.The next day，my dad took a day off from work and took me to a nearby，small arts college.”可知，然而，他们(
19、父母)没有对我喊叫或打我，只 是抱着我哭了。 第二天， 我爸爸请了一天假， 带我去了附近的一所小型艺术学院。 所以作者的父母没有因为他退学而责罚他，而是原谅了他。故 D 选项正确。 7In the arts college the author . Arebuilt his confidence Bvolunteered at many labs Cfound it hard to learn biology Dhated the learning environment A 推理判断题。 根据第四段中的“Before my first biology test， I didnt think
20、I could pass.I did pass.Since I had so much free time，I decided to join a biology lab.I realized that was what I wanted to do! I wanted to be a scientist！”可知，在我第一 次生物考试之前，我认为我不能通过。但是我真的通过了。因为我有很多的空闲 时间，所以我决定加入一个生物实验室。我意识到这就是我想做的！我想成为一 名科学家！所以通过作者考试成绩，以及作者意识到了自己真正想做的事情可以 判断出，作者在新学校里逐渐找回了自信。故 A 选项正确。
21、8What do we know about the author from the last paragraph? AHe felt sorry for his parents. BHe discovered his true interest. CHe realized the importance of grades. DHe felt ashamed of his failing at MIT. B 细节理解题。由最后一段中的“Ive finally discovered my passion(热情) 5 in life”可知，我终于发现了我生活中的激情！所以作者找到了生活中自己的兴
22、趣所在。故 B 选项正确。 .读后续写 阅读下面材料，根据其内容和所给段落开头语续写两段，使之构成一篇完整 的短文。续写的词数应为 150 左右。 One winter Sunday，my little sister，Colleen，and I built the greatest snowman ever.We gave him a carrot nose，beautiful hat，cozy scarf and gloves.He was a masterpiece(杰作) The next morning when looking outside，we smiled lovingly a
23、t him over our meal.We gave him a high- five as we passed by on our way to school.A lot of kids went past our house，so he was the hot topic at our school that morning.It was our pride! The day dragged on until finally we could rush home.But as our yard came into sight，we saw something wrong.The snow
24、man was gone! We only found a broken stick here，a torn glove there and balls of snow everywhere.Worst of all，the snowmans once- proud carrot nose lay limp(无力的)and half- eaten. What had happened? We were both astonished and angry.But then， we were only kids，who wouldnt have anything taking away our h
25、appiness.Actually we knew only one thing：Our snowman would rise again.And so we rebuilt him. The next day we came home to find another mess on the front lawn(草坪)For the rest of the week，the destruction was repeated daily.Each afternoon wed return to find our snowman had fallen apart，and then we buil
26、t again. By Saturday morning，we had a plan.We borrowed a really big bucket (水桶) from Mom，filled it with water and left it outside.The next morning，it was frozen solid.We packed snow all around the ice block as the base ( 底 座 )of the snowman.Then we built the other parts of it once again.The trap was
27、 set，and we waited for the snowman bullies(破坏者)to come. Paragraph 1： Monday morning， hiding behind the window， we soon saw what we were waiting for. 6 Paragraph 2： Seeing their pained look，we couldnt help laughing. 【参考范文】 Monday morning，hiding behind the window，we soon saw what we were waiting for.I
28、t turned out that there were three of them from our school.They sneaked up on our snowman and sneered.Taking their places on either side，they pulled back their legs to deliver powerful kicks.But the moment they hit the hard ice block of the base， sneers turned into shock， then agony and tears.They h
29、owled and cursed， gritting their teeth and stomping their feet. Seeing their pained look，we couldnt help laughing.They were too funny as they hopped away holding their damaged feet.We just couldnt contain our happiness and excitement.With a hearty laugh，we came out of hiding and sprang into the yard from inside the house.“An eye for an eye! Justice done！” We yelled behind them.And that was the end of our problems with the snow bullies.Ever since then，our snowman was kept guarded and intact until it happily melted into spring water and finally wove into our sweetest childhood memories.
