首页
登录
职称英语
Sand: as children we play on it and as adults we relax on it. It is somethin
Sand: as children we play on it and as adults we relax on it. It is somethin
游客
2024-08-15
24
管理
问题
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.
【B1】______And it is a major element in manufactured products too—concrete is largely sand, while glass is made of little else.
【B2】______ 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.
【B3】______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.
【B4】______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.
【B5】______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.
Questions 61—65
Complete the passage with the following sentences. There are two extra sentences that you do not need to use.
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 an 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. [br] 【B4】
选项
答案
G
解析
本段介绍的是沙子的颜色。G句可以作为总起句。
转载请注明原文地址:https://tihaiku.com/zcyy/3721334.html
相关试题推荐
Sand:aschildrenweplayonitandasadultswerelaxonit.Itissomethin
Sand:aschildrenweplayonitandasadultswerelaxonit.Itissomethin
Sand:aschildrenweplayonitandasadultswerelaxonit.Itissomethin
Underwhatagecan’tchildrenshootadvertisement?[br][originaltext]16.Chil
Ithinkbeingaloneisneverreallyabadthing,______you’vegotsomethingposi
Tina’schildren,______alllivenearby,organizedabigpartyforhereightieth
Myapproachisnottolearneverythingaboutsomething,but______somethingabo
WhyisChildren’sSkiingDaytobeheld?[br][originaltext]Inconjunctionwith
WhyisChildren’sSkiingDaytobeheld?[br][originaltext]Inconjunctionwith
WhyisChildren’sSkiingDaytobeheld?[br][originaltext]Inconjunctionwith
随机试题
WhichofthefollowingdetailsaboutthemanisCORRECT?[br][originaltext]W:
PhyllisWheatleyisregardedasAmerica’sfirstblackpoet.Shewasbornin
决定出版物发行渠道长短的标志是( )。A.流通路程的远近 B.工作人员的多少
某饭店有客房120间,预测年平均出租率为65%,每间客房一天配备2套多次性消耗客
【答案】4π【考情点拨】本题考查了二重积分的知识点. 【应试指导】因积分区域为圆x2+y2=22的上半圆,则
甲集团为国有大型钢铁企业,近年来,国内钢铁行业产能过剩,国际铁矿石价格居高不下,
牙体预备时,为减小对牙髓的损害所采取的措施是A.轻压磨切 B.以上都对 C.
因擅长演唱歌剧中的抒情性和戏剧性角色,音色明亮、圆润、丰满,被誉为“highC”
“忧者见之而忧,喜者见之而喜”形容的是()。A.心境 B.应激 C.心
以下有关确定最佳治疗方案的叙述,错误的是A使患者能遵从医嘱用药 B减少药物不良
最新回复
(
0
)