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
46
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] 【C10】
选项
A、as
B、which
C、what
D、that
答案
B
解析
这是一个非限制性定语从句,先行词为“事物”,所以选which。
转载请注明原文地址:https://tihaiku.com/zcyy/3180692.html
相关试题推荐
Thefrontgardenofourhousecontainsalawn,______verypleasanttositonin
Thehouseallocatedtothemwaspleasantand______.A、spaciousB、wideC、sufficien
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
Treesdomorethanmakelifepleasant;theymakelife【C1】______.Treesget
随机试题
Areportpublishedrecentlybringsbadnewsaboutairpollution.Itsuggests
衍生品市场包括()等子市场。A、远期B、期货C、期权D、互换A,B,C,D衍生品市场包括远期、期货、期权、互换等子市场。故本题选ABCD。
[originaltext]1.Theboardingtimeontheticketsays17:05,andnowit’s16:15
[originaltext]Readingtooneselfisamodernactivitywhichwasalmostunkn
如何理解赫尔巴特的“教育性教学”?
人防工程中应根据建筑物的功能用途、建筑规模和建筑中可燃物的数量情况设置防排烟设施
图示项目处于严寒B区,散热器设置位置错误的是( )。 A.A处 B.B处
企业本月购入小汽车一辆,按照现行企业财务制度及相关规定,该汽车的购置费用属于企业
Thechangeinthatvillagewasmiraculou
日经225指数属于典型的()。 A.期现套利B.市场内价差套利 C.市场
最新回复
(
0
)