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
Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters,【72】. One micron is a thousa
Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters,【72】. One micron is a thousa
admin
2011-01-05
44
问题
Bacteria are extremely small living things. While we measure our own sizes in inches or centimeters,【72】. One micron is a thousandth of a millimeter; a pinhead is about a millimeter across. Red-shaped bacteria are usually from two to four microns long, while rounded ones are generally one microns in diameter. Thus, if you enlarged a rounded bacterium a thousand times,【73】. An adult human magnified by the same amount would be over a mile (1.6 kilometers) tall.
Even with an ordinary microscope, you must look closely to see bacteria.【74】, one finds that bacteria are barely visible as tiny rods or dots. One cannot make out any things of their structure. Using special strains,【75】. Others have only one flagellum. The flagella (游丝) rotate, pushing the bacteria through the water. Many bacteria lock flagella and cannot move about by their own power,【76】.
From the bacterial point of view, the world is a very different place from what it is to humans. To a bacterium,【77】. Bacteria are so small that they are influenced by the movements of the chemical molecules around them. Bacteria under the microscope, even those with no flagella, often bounce about in the water. This is because【78】. Molecules move so rapidly that within a tenth of a second the molecules around a bacterium have all been replaced by new ones; even bacteria without flagella are thus constantly exposed to a changing environment.
Sentence:
A. Using a magnification of 100 times.
B. It would be just about the size of a pinhead.
C. Water is as thick as molasses is to us.
D. The bacteria content different liquids.
E. Bacterial size is measured in microns.
F. While other can glide along over surfaces.
G. They collide with the water molecules and are pushed this way and that.
H. One can see that some bacteria have attached to the wavy-looking "hairs" called flagella.
选项
答案
E
解析
转载请注明原文地址:https://kaotiyun.com/show/J2VK777K
本试题收录于:
C类竞赛(非英语专业本科)题库大学生英语竞赛(NECCS)分类
0
C类竞赛(非英语专业本科)
大学生英语竞赛(NECCS)
相关试题推荐
Surprisingly,nooneknowshowmanychildrenreceiveeducationinEnglishhospitals,stilllessthecontentorqualityofthate
(1)InthesouthofSpain,therewasasmallvillagewhosepeoplewereveryjoyfulandlucky.Thechildrenplayedundertheshad
Vibrationsinthegroundareapoorlyunderstoodbutprobablywidespreadmeansofcommunicationbetweenanimals.Itseems【C1
ConsideringhowjazzistranscribedinChinese(jueshi),youmaybe【C1】________intoassumingthatitisanaristocraticcultura
HowtoGettheMostfromYourCollegeProfessors【T1】________yourprofessors.usetheschool’s【T2】________—thepr
HowtoGettheMostfromYourCollegeProfessors【T1】________yourprofessors.usetheschool’s【T2】________—thepr
BabiesLearnFasterwithOthersAroundAnewstudyhasfoundthatyoungbabieslearninglanguagesthroughvideomaterialsdo
Electroniccigarettesshouldbesubject________thesametaxesandlimitationsonpublicuseastraditionaltobaccoproducts.
Accordingtoanewschoolofscientists,technologyhasbeenoverlookedasaforceinexpandingthehorizonsofscientificknowl
随机试题
下列属于敏捷制造系统概念层的是()
按照国际上对慢性淋巴细胞白血病的分期,A期病人可有
女,9个月。患肺炎,现突然出现烦躁不安,发绀加重。体检:呼吸64次/分,脉搏180次/分,心音低钝,两肺布满细湿哕音,肝右肋下3cm。本患儿病情得到控制的主要依据是
进展报告是
骨折的急救不包括
下列关于射极输出器的特点叙述正确的为()。
承包单位应对分包项目的工程()等实施监督和管理。
学生通过亲身探究、体验等方式获得的知识,理解更加深刻,记忆更加牢固。因此,要使学生获得更好的发展,教学应该以直接经验为主。()
软件测试方法一般有黑箱测试和白箱测试,而其中黑箱测试主要是依据程序的
A、Givingseverepunishmentstotrafficviolators.B、Encouragingpeopletotravelonpublicbuses.C、Controllingthepurchaseof
最新回复
(
0
)