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
87
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.
Sugar is made for its food by ______.
选项
A、sunlight
B、veins
C、stem
D、green leaves
答案
D
解析
第二段的第一句话说:“Green leaves make food for the whole plant.”第三段说“The plant make sugar for its food.”由此可见,是绿叶制造出sugar作为自己的食物,而stem和veins只是sugar流经和储存的地方。
转载请注明原文地址:https://kaotiyun.com/show/QTwd777K
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
______thenewteacherappearedatthedoor,thestudentsstoppedtalking.
Peoplewouldstopfeelinguneasywhenrealisingthatthechildrenthey’retalkingto______.Whichofthefollowingbestdescri
你是李明,请给在美国学习的王力发一封电子邮件。地址:wlujak@u.washington.edu内容:打算明年去美国的加州大学学习,向他了解中国学生在美国学习的情况。发邮日期:2005年12月25日,星期六,9点30分你的
WhywasHenryFordabletosellmillionsofcars?
根据下面的提纲写一篇短文:1.国家的发展依靠教育的发展;2.个人发展的关键也在于教育;3.我们要十分重视教育。注意:词数100左右。
Whatarethespeakerstalkingabout?
TobaccoYoumostlikelyknowthattobaccoisaplant.Ithaslargeleavesthathavebeensmokedinmanyformsforatleast2
ThemanattheroadsidetellstheAmericanitisclosetothenextvillagebecause______.Theshortpassageadvisesusto______
Thebesttitleforthispassageis______.Thesupplyofgroundwaterisgettinglowbecauseof______.
Millionsofstarsare______.Theexpression"thecauseofthedisturbance"refersto______.
随机试题
甲企业拥有三幢房产,分别为厂房A、厂房B和一幢办公楼,其中厂房A为与乙企业和丙企业共同共有,2014年有关甲企业房产的事项如下。(1)乙企业准备将厂房A进行内部装修,添置新的附属设施,经查,甲、乙、丙三个企业事先均没有约定处理方式,乙企业与甲企业
门静脉高压症患者,分流手术前的护理措施哪项是错误的
HDPE膜不得在()施工。
“经营单位”栏:“毛重”栏:
在对流动资金贷款的管理过程中,银监会可根据《银行业监督管理法》相关规定对贷款人进行处罚的情形包括()。
高某因盗窃被判处有期徒刑一年,缓刑一年,目前正在社区矫正,他生活无着,情绪低落,经常与邻居发生冲突,社区调解员曾多次上门调解他与邻居的纠纷。社区工作者小赵了解到高某曾做过汽车修理工,通过多方联络,为他找到汽车修理厂的工作。为改善高某与邻居的关系,改变他低落
戊戌变法中维新派的局限性主要体现在()。
在下列现象中,可以成为地球自转证据的是()。
发展速度素质的最佳年龄为()
Whatwillhappenifyoudonottouchthebutton“START”?Themicrowaveoven______.
最新回复
(
0
)