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
专升本
Trees have a spectacular (壮丽的;奇观的) survival record. Over a period of more than 400 million years, they have evolved as the talle
Trees have a spectacular (壮丽的;奇观的) survival record. Over a period of more than 400 million years, they have evolved as the talle
admin
2007-12-30
59
问题
Trees have a spectacular (壮丽的;奇观的) survival record. Over a period of more than 400 million years, they have evolved as the tallest, most massive, and longest-lived organisms ever to inhabit the Earth. Yet trees lack a means of defense that almost every animal has: trees cannot move away from destructive forces. Because they cannot move, all types of living and nonliving enemies—fire, storms, microorganisms, insects, other animals and, later, humans—have wounded them throughout their history. Trees have survived because their evolution has made them into highly compartmented (分隔的) organisms: that is, they wall off injured and infected wood.
In that respect trees are radically different from animals. Fundamentally, animals heal, they preserve their life by making billions of repair, installing (安置) new cells or rejuvenated (恢复活力的) cells in the positions of old ones. Trees cannot heal; they make no repairs. Instead, they defend themselves from the consequences of injury and infection by walling off the damage. At the same time they put new cells in new positions; in effect, they grow a new tree over the old one every year. The most obvious results of the process are growth rings, which are visible on the cross section of a trunk, a root, or a branch.
The author describes trees as all of the following EXCEPT______.
选项
A、tall
B、green
C、massive
D、long-lived
答案
B
解析
转载请注明原文地址:https://kaotiyun.com/show/WQLC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
About70millionAmericansaretryingtoloseweight.Thatisalmost1outofevery3peopleintheUnitedStates.Somepeopleg
Whatisthemainideaofthepassage?______.Foroveramillionyears,ourforefatherswerebasically______.
Basketballisasportenjoyedbymillionsoffansinatleast100countries.It’soneofthebest-knownsportsintheworld.It
Treeshaveaspectacular(壮丽的;奇观的)survivalrecord.Overaperiodofmorethan400millionyears,theyhaveevolvedasthetalle
Althougheachbabyhasanindividualscheduleofdevelopment,generalpatternsofgrowthhavebeenobserved.Threeperiodsofde
Althougheachbabyhasanindividualscheduleofdevelopment,generalpatternsofgrowthhavebeenobserved.Threeperiodsofde
Althougheachbabyhasanindividualscheduleofdevelopment,generalpatternsofgrowthhavebeenobserved.Threeperiodsofde
随机试题
某公司行政部人员手机使用情况如下:①小王拨打过行政部所有人的电话。②小李曾经拨打过小赵的电话,但是小赵不曾拨打过其他人的电话。③不曾接听来自行政部其他人电话的人也就不曾拨打过其他人的电话。如果以上信息为真,可以推出以下哪项?
正常人尿液中可见的管型是
釉质发育不全与浅龋区别为
在社区口腔健康咨询中针对“氟化物有害健康”的错误认识,应大力提倡
男性,72岁,无牙颌,全口义齿戴用10年。临床检查发现义齿人工牙颌面重度磨耗,口角下垂,口角黏膜糜烂。该患者还可能存在的临床表现是()
中等卫校毕业生林某,在乡卫生院工作,2000年取得执业助理医师执业证书。他要参加执业医师资格考试,根据《执业医师法》规定,应取得执业助理医师执业证书后,在医疗机构中工作满
下列情况中,招标投标中属于废标的有()。
简述动机及其功能。
“只有认识错误,才能改正错误。”以下诸项都准确表达了上述断定的含义,除了:
Itisimportantthatthecommittee(inform)______abouttheprojectatonce.
最新回复
(
0
)