Without regular supplies of some hormones our capacity to behave would be seriously impaired; without others we would soon die. Tiny amounts of some hormones can modify moods and actions, our inclination to eat or drink, our aggressiveness or submissiveness, and our reproductive and parental behavior. And hormones do more than influence adult behavior; early in life they help to determine the development of bodily form and may even determine an individual’s behavioral capacities. Later in life the changing outputs of some endocrine glands and the body’s changing sensitivity to some hormones are essential aspects of the phenomena of aging.
Communication within the body and the consequent integration of behavior were considered the exclusive province of the nervous system up to the beginning of the present century. The emergence of endocrinology as a separate discipline can probably be traced to the experiments of Bayliss and Starling on the hormone secretion. This substance is secreted from cells in the intestinal walls when food enters the stomach; it travels through the bloodstream and stimulates the pancreas to liberate pancreatic juice, which aids in digestion. By showing that special cells secret chemical agents that are conveyed by the bloodstream and regulate distant target organs or tissues. Bayliss and starling demonstrated that chemical integration could occur without participation of the nervous system.
The term “hormone” was first used with reference to secretion. Starling derived the term from the Greek hormone, meaning “to excite or set in motion. The term “endocrine” was introduced shortly thereafter “Endocrine” is used to refer to glands that secret products into the bloodstream. The term “endocrine” contrasts with “exocrine”, which is applied to glands that secret their products though ducts to the site of action. Examples of exocrine glands are the tear glands, the sweat glands, and the pancreas, which secrets pancreatic juice through a duct into the intestine. Exocrine glands are also called duct glands, while endocrine glands are called ductless.
1.What is the author’s main purpose in the passage?
A.To explain the specific functions of various hormones.
B.To provide general information about hormones.
C.To explain how the term “hormone” evolved.
D.To report on experiments in endocrinology.
2.The passage supports which of the following conclusions?
A.The human body requires large amounts of most hormones.
B.Synthetic hormones can replace a person’s natural supply of hormones if necessary.
C.The quantity of hormones produced and their effects on the body are related to a person’s age.
D.The short child of tall parents very likely had a hormone deficiency early in life.
3.It can be inferred from the passage that before the Bayliss and Starling experiments, most people believed that chemical integration occurred only___.
A.during sleep.
B.in the endocrine glands.
C.under control of the nervous system.
D.during strenuous exercise.
4.The word “liberate” could best be replaced by which of the following?
A.Emancipate B.Discharge C.Surrender D.Save
5.According to the passage another term for exocrine glands is___.
A.duct glands
B.endocrine glands
C.ductless glands
D.intestinal glands.
BDCBA
暂无解析
Part V Writing
写作指导
这是一篇描写文 (Description)。用通俗的话说,描写文就是用文字给人物、地点、景物画象。一篇描写文主要是通过所感受的细节——所见所闻发展而来的。在写人 时,不仅仅要用细节描写其外貌,而要注重通过他的言行来表现其人物性格、思想和品德,更要抓住他区别于他人的性格特点,这样就容易给读者留下深刻的印象。短文的第一、二段叙述故事发生的时间、地点,故事发生的原因及故事所涉及的人物。文章的三、四、五段描写的是人物的外貌,穿着及性格特点。通过对人物言行 的简单描写来揭示主人翁的助人为乐的高尚精神。短文的最后一段,要用一句话概括作者对主人翁的看法: A good guy。文章有描述,有议论,要加叙加议,有血有肉,上下文连贯要紧密,首尾要呼应,人和事要给人们留下深刻印象。
Passage 2
Questions 6 to 10 are based on the following passage:
The food we eat seems to have profound effects on our health. Although science has made enormous steps in making food more fit to eat, it has, at the same time, made many foods unfit to eat. Some research has shown tat 40 percent of cancer is related to the diet as well, especially cancer of the colon. Different cultures ate more prone to get certain illnesses because of the food that is characteristic in these cultures. That food is related to illness is not a new discovery. In 1945, government researchers realized that nitrates and nitrites, commonly used to preserve color in meats, and other food additives, caused cancer. Yet these carcinogenic additives remain in our food, and it becomes more difficult all the time to know which things on the packaging labels of processed food are helpful or harmful. The additives that we eat are not all so direct. Farmers often give penicillin to beef and poultry, and because of this, penicillin has been found in the milk of treated cows. Sometimes similar drugs are administered to animals not for medicinal purposes, but for financial reasons. The farmers are simply trying to fatten the animals in order to obtain a higher price on the market. Although the Food and Drug Administration (FDA) has tried repeatedly to control these procedures, the practices continue.
6. How has science done a disservice to mankind?
A. Because of science, most of the foods we eat today are contaminated.
B. It has caused a lack of information concerning the value of food.
C. As a result of scientific intervention, some potentially harmful substances has been added to our food.
D. The scientists have preserved the color of meats, but not of vegetables.
7. What are nitrates used for?
A. They preserves flavor in packaged foods.
B. They preserve the color of meats.
C. They are the objects of research.
D. They cause the animals to become fatter.
8. The FDA has tried repeatedly to control .
A. the attempt to fatten the animals
B. the attempt to cure sick animals
C. the using of drugs to animals
D. the using of additives to preserve the dolor of food
9. The word “carcinogenic” means most nearly the same as .
A. trouble-making B. color-retaining
C. money-saving D. cancer-causing
10. Which of the following statements is NOT true?
A. Drugs are always given to animals for medical reasons.
B. Some of the additives in our food are added to the food itself and some are given to the living animals.
C. Researchers have known about the potential hazards of the food additives for over thirty-five years.
D. Food may cause forty percent of cancer in the world.
Passage4
Questions16to20arebasedonthefollowingpassage:
Cultureshockisanoccupationaldisease(职业病)forpeoplewhohavebeensuddenlytransplantedabroad.
Cultureshockiscausedbytheanxietythatresultsfromlosingallfamiliarsignsandsymbolsofsocialintercourse.Thosesignsareasfollowing:whentoshakehandsandwhattosaywhenmeetpeople,whenandhowtogivetips,howtomakepurchases,whentoacceptandrefuseinvitations,whentotakestatementsseriouslyandwhennot.Thesesigns,whichmaybewords,gestures,facialexpressions,orcustoms,areacquiredbyallofusinthecourseofgrowingupandasmuchapartofourcultureasthelanguagewespeakorthebeliefsweaccept.Allofusdependonhundredsofthesesignsforourpeaceofmindandday-to-dayefficiency,butwedonotcarrymostatthelevelofconsciousawareness.
Nowwhenanindividualentersastrangeculture,allormostofthesefamiliarsignsareremoved.Nomatterhowbroadmindedorfullofgoodwillyoumaybeaseriesofsupportshavebeenknockedfromunderyou,followedbyafeelingoffrustration.Whensufferingfromcultureshockpeoplefirstrejecttheenvironmentwhichcauseddiscomfort.Thewaysofthehostcountryarebadbecausetheymakeusfeelbad.Whenforeignersinastrangelandgettogetherincomplainaboutthehostcountryitspeople,youcanbesurethattheyaresufferingfromcultureshock.
16.Accordingtothepassage,cultureshockis.
A.anoccupationaldiseaseofforeignpeopleB.mayleadtoveryserioussymptoms
C.actuallynotadiseaseD.incurable
17.Accordingtothepassage,cultureshockresultfrom.
A.thesuddenchangeofsocialatmosphereandcustoms
B.thesuddenchangeofourdailyhabits
C.thesuddenlossofourownsignsandsymbols
D.thediscomfortthatwefeelwhenfacedwithaforeigner
18.Whichoneofthefollowingmaynotbeasymptomofcultureshock?
A.Youdon’tknowhowtoexpressyourgratitude.
B.Youdon’tknowhowtogreetotherpeople.
C.Yousuddenlyforgetwhatawordmeans.
D.Youdon’tunderstandwhyaforeignershrugs.
19.Accordingtothepassage,howwouldapersonwhostaysabroadmostprobablyreactwhenheisfrustratedbythecultureshock?
A.Heismostlikelytorefusetoabsorbthestrangeenvironmentatfirst.
B.Heisreallytoacceptthechangeandadapthimselftothenewenvironment.
C.Althoughhetakestheculturedifferenceforgranted,hestilldoesn’tknowhowtodowithit.
D.Hemaybegintohatethepeopleorthingsaroundhim.
20.Themainideaofthispassageisthat.
A.cultureshockisanoccupationaldisease
B.cultureshockiscausedbytheanxietyoflivinginastrangeculture
C.cultureshockhaspeculiarsymptoms
D.itisveryhardtocopewithlifeinanewsetting
翻译训练:地域特色文明
文明是多彩的,人类文明因多样才有交流互鉴的价值。文明是平等的,人类文明因平等才有交流互鉴的前提。文明是包容的,人类文明因包容才有交流互鉴的动力。
当今世界,人类生活在不同文化、种族、肤色、宗教和不同社会制度所组成的世界里,各国人民形成了你中有我、我中有你的命运共同体。应该推动不同文明相互尊重、和谐共处,让文明交流互鉴成为增进各国人民友谊的桥梁、推动人类社会进步的动力、维护世界和平的纽带。应该从不同文明中寻求智慧、汲取营养,为人们提供精神支撑和心灵慰藉,携手解决人类共同面临的各种挑战。
GSM 中控制信道有哪几个?这些信道分别适用于何种场合?
在当前对话框上,获得 “视图 ”的帮助信息。
电信网的拓扑结构
设置批注的背景色为红色,文本为竖排文本。
简述小区制移动通信网络的结构。
在GPRS网络内,定义了哪几种不同的业务?
在当前 Excel 中,通过任务窗格,打开 D 盘上的 dch.xls 文件,打开权限的 密码为: 123,修改权限的密码为 456。
简述中国国内卫星通信网主要承担的任务。
从任务窗格中搜索 “工作区 ”的帮助信息,并打开 “删除文档工作区 ”的帮助信息。
建立一个新的工具栏,取名 “文件保存 ”,在上面加入 “保存” 、“另存为 ”、“保 存工作区 ”三个按钮。