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
49
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.
To make food, plants need a lot except ______.
选项
A、the air
B、the soil
C、green leaves
D、dead leaves
答案
D
解析
从第一段可知,the air、the soil和green leaves都是植物制造食物的必需条件,而dead leaves根本不可能制造食物。所以D是正确答案。
转载请注明原文地址:https://kaotiyun.com/show/LTwd777K
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
—YouspeakverygoodEnglish.—______.
ThemanattheroadsidetellstheAmericanitisclosetothenextvillagebecause______.WelearnfromthispassagethatAmer
【B1】【B19】
Whereistheconversationtakingplace?
请根据提示,以“为什么学英语”为题,写一篇英语说明文。词数100左右,内容包括:1.学英语的重要性。2.英语是世界上广泛应用的语言。国际会议多用英语;重要书籍多为英语版;懂得英语可以加强对世界各国的了解;不论将来做什么,英语都是十分重要的。
Whatarethespeakerstalkingabout?
WASHINGTON--consideringtheseriouswarningslatelyaboutInternetviruses(病毒),usersmaydon’tusetheirmachinesjusttoke
Thefilmbroughtmetothetimes______Iwastakengoodcareofinthatsmallvillage.
MillionsofpeopleareenrolledineveningadulteducationprogramsacrossAmerica.Communitycollegeshave【B1】popularandthe
Millionsofstarsare______.Theexpression"thecauseofthedisturbance"refersto______.
随机试题
应激时应激性溃疡的发生与下列哪一项因素无关?
猪屠宰检验时,猪肉孢子虫的主要检验部位是
实行转授权的,在金额、种类和范围上均不得大于原授权,这体现的是信贷授权原则中的()。
提高企业经济效益的基本要求是()。
简述学生智力发展差异的主要表现。
根据以下资料,回答问题。2016年,我国全年完成邮电业务收入总量43344亿元,比上年增长52.7%。其中,邮政业务总量7397亿元,增长45.7%;电信业务总量35948亿元,增长54.2%。邮政业全年完成邮政函件业务36.2亿件,包裹业务
大学生李某要去A市某会计师事务所实习。此前,李某通过某租房网站租房,明确租房位置和有淋浴热水器两个条件。张某承租了王某一套二居室,租赁合同中有允许张某转租的条款。张某与李某联系,说明该房屋的位置及房屋里配有高端热水器。李某同意承租张某的房屋,并通过网上银行
在吉尔福特的三维结构模型中,“符号”属于哪个维度?()
1905年11月,孙中山系统提出三民主义的刊物是()
Ifyou’reoneofthosepeoplewhotendstoputonweightaroundyourmiddle,whatdoctorscallan"appleshape"—whattherestof
最新回复
(
0
)