8.If you live in the U.S.,you're probably used to throwing banana peel into the trash.But people in other countries,including India,have been taking advantages of their nutritional benefits for many years.
While the flesh of a banana is soft and sweet,the skin is thick,hard and slightly bitter.To eat the peel,you can fry,bake,or boil it for at least 10minutes.Also,the riper bananas get,the thinner and sweeter banana peel will become.That's because of a natural plant hormone(激素) called ethylene(乙烯) that fruits release as they ripen.Ethylene interacts with the sugars and fiber in the banana skin,changing complex sugars into simple sugars and breaking down pectin,a form of fiber in bananas that keeps them stiff.That's why the older your banana is,the flimsier(不結(jié)實的) it feels.
The sweet flesh of a medium-sized banana contains great percentages of your daily recommended intake of various nutrients,such as:
•12% of your daily fiber,which helps with digestion and may help lower your risk of diabetes(糖尿�。�
•17% of your vitamin C,which is important for your immune system as well as your growth
•20% of your vitamin B6,which aids the body's ability to turn food into energy
•12% of your potassium,which helps with the development of cells,tissues,and organs throughout the body
If you eat the skin along with the flesh,you will get an even bigger increase in these same nutrients.
Eating the peel is not only good for your body but also better for the earth.The average American ate 11.4pounds of bananas in 2014.Since a medium-sized banana weighs about 0.3pounds,that equates to about 38bananas per person,or about 12billion for the whole of the U.S.And since most of us throw away the peel,that also means a lot of organic waste.
25.We can learn from the text that in the U.S.peopleC.
A.like eating bananas
B.waste a lot of food every year
C.don't make good use of banana peel
D.know little about the value of the flesh of bananas
26.What's the role of ethylene in bananas?D
A.Helping bananas grow faster.
B.Making banana peel stay strong.
C.Keeping banana flesh from going bad.
D.Helping to soften and sweeten banana peel.
27.Which of the following helps humans digest?D
A.Vitamin C.
B.Potassium.
C.Vitamin B6.
D.Fiber.
28.The last paragraph mainly shows that eating banana peel benefits ourC.
A.diet
B.economy
C.environment
D.physical health.
分析 本文主要講述了日常生活中我們可能會丟棄的香蕉皮對我們的好處,不僅是身體方面的益處,也有益于環(huán)境的保護.
解答 25.C 細節(jié)理解題.根據(jù)文章內(nèi)容,If you live in the U.S.,you're probably used to throwing banana peel into the trash.But people in other countries,including India,have been taking advantages of their nutritional benefits for many years如果你居住在美國,那么你有可能會習慣于把香蕉皮扔了.但是在其它國家,尤其在印度,人們已經(jīng)充分利用香蕉皮的營養(yǎng)很多年了,結(jié)合選項,故選C.
26.D 細節(jié)理解題.根據(jù)文章內(nèi)容,Ethylene interacts with the sugars and fiber in the banana skin,changing complex sugars into simple sugars and breaking down pectin,a form of fiber in bananas that keeps them stiff.That's why the older your banana is,the flimsier(不結(jié)實的) it feels.由此可知,香蕉皮里的乙烯能改變香蕉里的多糖,將其變?yōu)楫斕牵沟媚z質(zhì)分解,使得香蕉變送變軟.結(jié)合選項,故選D.
27.D 細節(jié)理解題.根據(jù)文章內(nèi)容,12% of your daily fiber,which helps with digestion and may help lower your risk of diabetes(糖尿�。┯纱丝芍�,纖維可以幫助我們消化且降低糖尿病的患病幾率.結(jié)合選項,故選D.
28.C 細節(jié)理解題.根據(jù)文章內(nèi)容,Eating the peel is not only good for your body but also better for the earth.The average American ate 11.4pounds of bananas in 2014.Since a medium-sized banana weighs about 0.3pounds,that equates to about 38bananas per person,or about 12billion for the whole of the U.S.And since most of us throw away the peel,that also means a lot of organic waste.吃香蕉皮不但對我們的身體有好處,而且還有益于地球.可錢少垃圾的數(shù)量和重量,對環(huán)境有益.結(jié)合選項,故選C.
點評 本文是一個科教類閱讀理解,題目涉及多道細節(jié)理解題,做題時結(jié)合原文和題目有針對性的找出相關語句進行仔細分析,結(jié)合選項選出正確答案.推理判斷題也是要在抓住關鍵句子的基礎上合理的分析才能得出正確答案,切忌胡亂猜測,一定要做到有理有據(jù).