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
63. The investigation of the accident lasted for almost two years. Sand: as children we play on it and as adults we relax on
63. The investigation of the accident lasted for almost two years. Sand: as children we play on it and as adults we relax on
admin
2009-12-11
41
问题
63. The investigation of the accident lasted for almost two years.
Sand: as children we play on it and as adults we relax on it. It is something we complain about when it gets in our eye on a windy beach, and praise when it is made into sand castles.
But we don’t often look at it. If we did, we would discover an account of a geological past and a history of sea life that goes back thousands and, in some cases, millions of years.
Sand covers not just seashores, but also ocean beds, deserts and mountains.
64.______
And it is a major element in manufactured products too—concrete is largely sand, while glass is made of little else.
65______
Well, it is larger than fine dust and smaller than shingle. In fact, according to the most generally accepted scheme of measurement, grains can be called sand if their diameter is greater than 0. 06 of a millimetre and less than 0. 6 of a millimetre.
Depending on its age and origin, a particular sand can consist of tiny stones or porous grains through which water can pass.
66 ______
They have come from the breaking down of rocks, or from the dead bodies of sea creatures, which collect on the bottom of the oceans, or even from volcanic eruptions.
67 ______
If it is a dazzling white, its grains may come from nearby coral, from crystalline quartz rocks or from gypsum, like the white sand of New Mexico. On Pacific Islands, jet black sands form from volcanic minerals. Other black beaches are magnetic and are mined for iron ore.
68______
It washes rock into streams and rivers and down to the sea, leaving behind softer materials. By the time it reaches the sea, the hardest rocks remain but everything else has been broken into tiny particles of 0. 02 millimetre diameter or less. The largest pieces fall to the bottom quickly, while smaller particles float and settle only slowly in deeper water, which is why the sandy beach on the shoreline so often turns to mud further out.
69______
If the individual fragments still have sharp edges, you can be sure they were formed fairly recently. This is the case on the island of Kamoama in Hawaii, where a beach was created after a volcanic eruption in 1990. Molten lava spilled into the sea and exploded into glassy droplets.
It seems that when the poet William Blake saw infinity in a grain of sand he was not far wrong.
70____
Sand is an irreplaceable industrial ingredient which has many uses.
Sand cushions our land from the force of the sea, and geologist say it often does a better job protecting our shores than the most advanced coastal technology.
A. These may have the shape of stars or spirals, their edges rough or smooth.
B. It is one of the most common substances on earth.
C. In addition, it has one vital function which you might never even notice.
D. Rain is all important force in the creation of beaches.
E. In the great slow cycle of the earth, sand that was once rock can turn to rock again.
F. What exactly is sand?
G. Colour is another clue to the origins of sand.
H. It can be difficult to date the sand on a beach accurately but it is possible to get a general idea of whether or not the sand is "young”or "old".
选项
答案
H
解析
空格后一句提到If the individual fragments still have sharp edges,you can be sure theywere formed fairly recently.如果每一小块周围仍是尖的,因而就敢肯定他们是刚刚形成不久的。谈论的是沙子的形成,H项符合题意。
转载请注明原文地址:https://kaotiyun.com/show/7IVK777K
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
PassageThreeTheauthormostprobablybelievesroledifferencesexistbecause_______.
PassageOneHowmanydisadvantagesofoveruseoftechnologyarerevealedinthepassage?
(1)Ah,praise.SopowerfularesimplewordsofapprovalandadmirationthatthelatepsychologistB.F.Skinneroncecalledprai
Peoplehavebeenpaintingpicturesforatleast30,000years.Theearliestpictureswerepaintedbypeoplewhohuntedanimals.T
PassageFourWhatdidDeniseSimmonsthinkofwhatthecitygovernmentbeforehertermhaddone?
Theartististhecreatorofbeautifulthings.Torevealartand【C1】________theartistisart’saim.Thecriticishewhoc
ItiscommonlybelievedthatintheUnitedStatesschooliswherepeoplegetaneducation.Nevertheless,ithasbeensaidthatt
PASSAGETHREEWhatdoestheauthormeanbysaying"Evenundertheworstofcircumstances,webelieveweareincontrolofourl
A、Beconfident.B、Beagoodlistener.C、Beenthusiastic.D、Askgoodquestions.A原文中,女嘉宾列出了一些建议,第一条就是要自信。因此答案为A。
Thelocalauthoritiesrealizedtheneedtomake________forelderlypeopleintheirhousingprograms.
随机试题
患者男性29岁,舌体外伤出现部分组织缺损,处理原则是
苯巴比妥的化学结构为()。
甲租赁乙的房屋居住,在租赁期间发生地震,房屋倒塌,已不适于居住,房屋倒塌砸毁甲的家具、电器数件。则甲:
张某出资1万元、王某出资2万元、陈某出资3万元共同设立了一家合伙企业,合伙协议中未约定利润分配和亏损承担的比例,三人约定由张某负责合伙企业事务的处理,王某和陈某不参与企业的经营和管理。企业成立后由于张某决策失误,1年后企业亏损6万元,以下关于亏损负担说法正
对设备及大、中型部件的局部进行清洗时,宜采用的方法是()。
2016年2月16日,高先生与一装潢公司签订了一份合同,委托该装潢公司进行装饰装修。但在工程结束后,高先生拒绝支付工程余款。假设装潢公司向法院提起民事诉讼,则诉讼的参与人不包括()。
票据伪造人由于未以自己的名义在票据上签章,所以不必承担任何责任。()
某国国民所拥有的全部生产要素在一定时期所生产的最终产品的市场价值指的是()。
在软件工程中,白箱测试法可用于测试程序的内部结构。此方法将程序看做______。
DearRalph,I’manewcomerhereofasmalltown.Iwould【76】______describemyselfasshyandquietly.B
最新回复
(
0
)