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
2023-11-12
23
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] 【C14】
选项
A、taken
B、derived
C、got
D、attained
答案
B
解析
derive from 意为“从……中得到”。
转载请注明原文地址:https://tihaiku.com/zcyy/3180696.html
相关试题推荐
Thefrontgardenofourhousecontainsalawn,______verypleasanttositonin
Sheisa______girl.A、good-natured,pleasant,well-manneredB、well-mannered,go
Theyhadapleasantchat______acupofcoffee.(1995年考试真题)A、forB、withC、during
Whatapleasantday,______?A、isitB、shan’titC、isn’titD、won’titC反意疑问句。此句的陈
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
随机试题
TheIndustrialRevolution[A]TheIndustrialRevolutioni
TheIndianvultureismediuminsizeandbulky.Itsbodyandcovertfeathe
公文横线②处,应该添加的具体内容是()。 A.培训流程 B.培训具体时间及地
施工投标报价的主要工作有:①复核工程量,②研究招标文件,③确定基础标价,④编制投
债券作为证明债权债务关系的凭证,一般以有一定格式的票面形式来表现。通常,债券票面
A.听神经损害 B.肝损害 C.球后视神经炎 D.胃肠道反应 E.骨髓抑
胰高血糖素升高血糖的机制是 A.促进肝糖原分解B.促进氨基酸异生为糖C.促进
多重信用风险组合模型被广泛应用于国际银行业中,其中(?)直接将转移概率与宏观因素
下面对商品持仓费的描述,正确的有()。A.基差的大小主要与持仓费有关 B.到达
牙瘤的特点是( )。A.成牙组织的错构或发育畸形 B.良性、单囊或多囊、发生
最新回复
(
0
)