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
69
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
Whatwouldbethebesttitleforthispassage?Whyare"bluepolyethylenebags"mentionedinparagraph2?
Thepassageismainlyabout______.Nearly80%ofpeopleover65havesomeseriousillnesses.Accordingtothetext,whichoft
Alotofproblemsconcerningeducationfee______attheconference.
MillionsofpeopleareenrolledineveningadulteducationprogramsacrossAmerica.Communitycollegeshave【B1】popularandthe
Fromthispassage,itcanbeinferredthat______.Accordingtothepassage,wegiveschoolchildrendifficultproblemstosolve
Packagingisanimportantformofadvertising.Apackagecansometimesmotivatesomeonetobuyaproduct.Forexample,asmallc
Millionsofstarsare______.Inthisarticle,thewritermainlywantstotellthereaders______.
Millionsofstarsare______.Theexpression"thecauseofthedisturbance"refersto______.
Millionsofstarsare______.Thearticlesuggeststhat______.
随机试题
巴纳德认为,组织的存在取决于协作系统平衡的维持,这种平衡最终和基本的是_________、_________。
医患关系的发展趋势是
下列房地产经济活动中,不属于房地产中介服务的有:()。
下面()是对《协调制度》归类总规则的正确理解。
各省的银行业协会是中国银行业协会的会员单位。()
某水库建有10个泄洪闸,现有水库的水位已经超过安全线,上游河水还在按不变的速度增加。为了防洪,需调节泄洪速度。假设每个闸门泄洪的速度相同,经测算,若打开一个泄洪闸,30个小时水位降至安全线:若打开两个泄洪闸,10个小时水位降至安全线。现在抗洪指挥部队要求在
______指消费者为满足其个人或家庭生活需要而发生的购买商品的决策或行动。
李老师用弹簧和物块做成如图1所示的弹簧振子演示振动图象。课前准备实验时,李老师觉得该弹簧振子振动频率过小,想让振子的频率增大一倍,为此他将()。
2014年1~5月,我国软件和信息技术服务业实现软件业务收入约13254亿元,同比增长20.9%,比去年同期回落3.3个百分点。其中,软件产品完成收入4141亿元,信息系统集成服务完成收入2649.3亿元,信息技术咨询服务完成收入1399.2亿元,数据处理
源程序的文档化不包括()。
最新回复
(
0
)