首页
登录
职称英语
Trees do more than make life pleasant; they make life【C1】______ . Trees get
Trees do more than make life pleasant; they make life【C1】______ . Trees get
游客
2024-10-10
27
管理
问题
Trees do more than make life pleasant; they make life【C1】______ . Trees get【C2】______ through their roots and, primarily through their leaves, they 【C3】______ carbon dioxide【C4】______ the air. Then, with the action of sunlight on cells 【C5】 chlorophyll and other materials, chemical reactions 【C6】______ , and oxygen is 【C7】______ . Through photosynthesis, an acre of trees produces enough oxygen to sustain three 【C8】______ .
Eating wood might seem odd,【C9】______ many low calorie breads and other baked goods now include powdered cellulose【C10】______ acts as a bulking agent to help hold the foods together.
Trees have always been green machines,【C11】______ substances that humans【C12】______ to use. The ancient Greeks, for example, treated pain【C13】______ a tea made by boiling willow leaves and bark; a tea modern scientists now know contains silicon, a precursor of acetylsalicylic acid aspirin. For centuries, the Chinese have【C14】______ medicines from the ginkgo tree. More recently, researchers isolated and synthesized the chemical ginkgolide from the tree【C15】______ use in treating asthma, toxic shock and other ills.
【C16】______ scientists unlock the secrets of trees, they 【C17】______ surprising facts. In the early 1980s David Rhoades, a chemical【C18】______ at the University of Washington, Seattle, discovered that trees send unseen signals to each other. When willows are attacked by webworms and tent caterpillars, they【C19】______ a chemical that alerts nearby willows. The neighboring trees respond by pumping more tannin into their leaves, making them more【C20】______ for the insects to digest. [br] 【C19】
选项
A、send off
B、relieve off
C、give off
D、set off
答案
C
解析
give off放出(烟、气等)。
转载请注明原文地址:https://tihaiku.com/zcyy/3795265.html
相关试题推荐
Thebackgardenofourhousecontainsalawn,______verypleasanttositoninsu
Themansittingoppositemesmileddreamily,asif______somethingpleasantin
Thedetectivewasgreetedwithanunpleasantsmellof______airwhenhestepped
To______forhisunpleasantexperienceshedrankalittlemorethanwasgoodfo
Theyhadapleasantchat______acupofcoffee.(1995年考试真题)A、forB、withC、during
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
随机试题
Lookattheformbelow.Youwillhearawomanaskingforcancellationof
BuildingsinthesoutheastoftheUKaregoingtohavetobeconstructed________
【S1】[br]【S4】if→though连接词误用。从上下文看这里应该是转折的关系,而不是假设的关系
TakingCareofParentsAlsoMeansTakingCareofFinancesDenise
下列属于既有法人用于项目资本金的内部资金来源的是()。A.企业产权转让 B.国
中华人民共和国公民必须遵守宪法和法律,( ),爱护公共财产,遵守劳动纪律,遵守
最可能引起胎儿发生缺血、缺氧的是A.母亲孕期严重低血压 B.母亲有轻度贫血
女,20岁,近一年来时有右下腹疼痛伴膀胱刺激症状。体检腹软、右下腹深压痛,右腰部
左边给定的是纸盒的外表面,下面哪一项能由它折叠而成?
下列有关货币资金内部控制的相关说法中,正确的是( )。A.在清查小组盘点现金时,
最新回复
(
0
)