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
64
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
DearKind-Trustee-Who-Sends-Orphans-to-College,HereIam!Itravelledyesterdayforfourhoursinatrain.It’safunnysen
PassageFourInthefamilymentionedinthepassage,whatdothespecialbrowniesmeantothechildren?
(1)AnIndianwebsite,ipaidabribe.com,setuplastsummerbyanti-corruptionactivists,revealsjusthowgreedyofficialscanbe
Theartististhecreatorofbeautifulthings.Torevealartand【C1】________theartistisart’saim.Thecriticishewhoc
Thetableclearlyreflectsthestatisticsofjobsatisfactionofthestaffinacertaincompany.Accordingtothedatagivenin
Itisnotsurprising,【C1】________thelackoffitbetweengiftedstudentsandtheirschools,thatsuchstudentsoftenhavelittl
Itisnotsurprising,【C1】________thelackoffitbetweengiftedstudentsandtheirschools,thatsuchstudentsoftenhavelittl
Animalsarelivingcreaturesandmostofusoftenforgetaboutit.Althoughtheycan’tspeakourlanguage,theycanunderstandu
FormanyyearsitwascommonintheUnitedStatestoassociateChineseAmericanswithrestaurantsandlaundries.Peopledidnot
(1)Theinternationalspacestationisgettinganew,inflatableroomthatresemblesagiantsparetire,NASAannouncedonWedne
随机试题
设随机变量X在区间[-1,2]上服从均匀分布,随机变量则方差D(Y)=__________.
在下列各式中,极限存在,但不能用洛必达法则计算的是
8个月男孩,母乳喂养,未加辅食,生后6个月内生长发育良好,2个月来面色黄、反应呆滞。查体:面色蜡黄,嗜睡,舌震颤,心肺无异常,肝肋下3cm,腱反射亢进,踝阵挛阳性。血红蛋白68g/L,红细胞1.90×109/L,白细胞6.2×109/L,中性粒细胞有核右移
乳牙根尖周炎常出现瘘管的原因是
检察院以涉嫌诈骗罪对某甲提起公诉。经法庭审理,法院认定,某甲的行为属于《刑法》规定的“将代为保管的他人财物非法占为己有并拒不退还”的侵占行为。对于本案,检察院拒不撤回起诉时,法院的哪种处理方法是正确的?()
A公司承建的某城市高架桥长1.68kin,上部结构为跨径30m的工梁,采用先简支后连续的结构形式共35跨,桥梁最高处9m,为双幅式桥面。桥梁下部结构为钻孔灌注桩,上接混凝土方形承台、八棱形墩柱和预应力钢筋混凝土盖梁。桥梁工程施工受所属快速路的通车限制,工期
下列各项税金中,在计算介业所得税时,不可以作为产品销售税金及附加在税前扣除的是()。
将一箱玫瑰(约合0.5体积吨)从广州运往北京,选用()方式比较合适。
世界上最早颁布义务教育的国家是()
A.Keprike’sresearchtoolB.DangersofhabitualshortagesofsleepC.CriticismonKripke’sreportD.Awayofovercominginso
最新回复
(
0
)