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
2023-10-17
15
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] 【B3】
选项
答案
A
解析
本段是对沙子的介绍。下一句句首的代词they和A项句首的代词These可以作为解题突破点。
转载请注明原文地址:https://tihaiku.com/zcyy/3106729.html
相关试题推荐
Whereisthemanrecommendedtoread?[br][originaltext]M:Somethingthatanno
Whereisthemanrecommendedtoread?[br][originaltext]M:Somethingthatanno
HowHealthyAreYou?Goodhealthisnotsomethingyo
HowHealthyAreYou?Goodhealthisnotsomethingyo
HowHealthyAreYou?Goodhealthisnotsomethingyo
HowHealthyAreYou?Goodhealthisnotsomethingyo
HowHealthyAreYou?Goodhealthisnotsomethingyo
HowHealthyAreYou?Goodhealthisnotsomethingyo
Haveyoueverthoughtaboutinventingsomething?Didyouworrythatyouride
Haveyoueverthoughtaboutinventingsomething?Didyouworrythatyouride
随机试题
InJanuary1989,theCommunityofEuropeanRailwayspresentedtheirproposal
NewresearchconductedbybrainresearcherAviKarnioftheUniversityofHa
[originaltext]W:SothisistheInternet?M:Well,it’stheWorldWideWeb,whi
牙周-牙髓联合病变治疗的原则是A.逆行性牙髓炎,如牙周病变十分严重,不易彻底控制
女性,58岁,间歇无痛肉眼血尿2个月余。查体未发现异常。B超检查提示
了解社区的(),不仅有利于激发社区居民的参与热情,而且有助于更加深入地了解社区。
被保险人死亡后,保险金可以作为被保险人遗产的情况有()。A.没有指定受益人
公路路政管理工作的主要内容包括()。A:建设公路 B:维护路权 C:保护路产
下列各项中属于涉税专业服务机构涉税业务内容的有( )。A.税收策划 B.纳税
铁路工程施工中,临时用电量设备配置要考虑()等因素来配置。A.供电部位 B.变
最新回复
(
0
)