首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Plants need green leaves to make food. A plant needs sunlight and carbon dioxide (二氧化碳) from the air for making food and it also
Plants need green leaves to make food. A plant needs sunlight and carbon dioxide (二氧化碳) from the air for making food and it also
admin
2012-05-08
71
问题
Plants need green leaves to make food. A plant needs sunlight and carbon dioxide (二氧化碳) from the air for making food and it also needs water and salts from the soil to make food too. There are certain cells (细胞) in the leaves which change carbon dioxide and water into sugar. To do this the cells need energy, which they get from the sunlight.
Green leaves make food for the whole plant. A red leaf can make food too because under the red coloring of the leaf there are food-making cells. There are no leaves that are completely yellow, for they can’t make food.
The plant makes sugar for its food. In sunlight green leaves make a lot of sugar. The veins (叶脉) can’t carry all this sugar away, so the leaves change the sugar into starch (淀粉), which is kept and so stored in the leaves. At night, the starch change back to sugar. It is then carried away from the leaves. Some of the sugar is used as food by the plant while the rest is stored as starch. In some plants, food is stored in the roots; in others it is stored in the stem and in leaves, fruits and seeds.
Food is stored in roots or stems in the form of ______.
选项
A、sugar
B、starch
C、water and salts
D、carbon dioxide
答案
B
解析
根据最后一段的一句话“…the rest(sugar)is stored as starch.”可以判断出正确答案B。
转载请注明原文地址:https://kaotiyun.com/show/hTwd777K
本试题收录于:
公共英语二级笔试题库公共英语(PETS)分类
0
公共英语二级笔试
公共英语(PETS)
相关试题推荐
【B1】【B9】
GettinganewPCisonething.Keepingitrunningsmoothlyisquiteanother.Whileapersonalcomputershouldcontinuetoperfor
Whereistheconversationtakingplace?
Dr.Turnerdecidedtoleavehispresentjobbecause______.Thetwodoctorsspentmostoftheafternoontalkingabout______.
______thenewteacherappearedatthedoor,thestudentsstoppedtalking.
Alotofproblemsconcerningeducationfee______attheconference.
Inthispassage,"tellitasitis"means"______".IfwewriteacompositioninBasicEnglish,itwillbe______.
Thebestwayoflearningalanguageis【S1】______byusingit.ThebestwayoflearningEnglishistalkingbyEnglishasmuch
Millionsofstarsare______.Theexpression"thecauseofthedisturbance"refersto______.
Millionsofstarsare______.Thearticlesuggeststhat______.
随机试题
WhendidKantbecomeaprofessor?
简述我国固体废物转移的法律制度。
抗风湿热治疗时阿司匹林的小儿剂量一般是
()是企业或行业或投资者以动态的观点所确定的,可接受的投资项目最低标准的收益水平。
监理工程师需要( )的复合型人才来承担。
按管理主体分,建设项目管理不包括()
下列选项中不正确的说法是________。
陈述性知识的表征形式是()。
A、 B、 C、 D、 A观察图形可以发现,一个“工”字型等于两个“十”字型,将“工”字型代换为“十”字后可得每个图形均含14个“十”字。故本题正确答案为A。
Moreandmorecompaniescompetetoprovideloanstostudentsfor______.AccordingtoMarkKanttrowitz,whatisthepreferredl
最新回复
(
0
)