首页
登录
职称英语
Sand covers not just sea-shores, but also ocean beds, deserts and mountains.
Sand covers not just sea-shores, but also ocean beds, deserts and mountains.
游客
2024-02-18
22
管理
问题
Sand covers not just sea-shores, but also ocean beds, deserts and mountains. It is one of the most common substances on earth. And it is a【B1】______element in man-made materials too—【B2】______is largely sand, while glass is made by melting sand and some other elements.
What exactly is sand? In fact, according to the most generally【B3】______scheme of measurement, devised by the Massachusetts Institute of Technology, grains qualify as sand if their【B4】______is greater than 0.06 of a millimeter and less than 0.6 of a millimeter.
Depending on its age and【B5】______, particular sand can consist of tiny pebbles or porous granules. Its grains may have the shape of【B6】______or spirals, their edges jagged or smooth. They have come from the【B7】______of rocks, or from the skeletons of marine organisms, which accumulate on the【B8】______of the oceans, or even from volcanic eruptions.
Usually, the older the granule,【B9】______The fine, white beaches of northern Scotland, for instance, are recycled from sandstone several hundred million years old.【B10】______.
Sand is an irreplaceable industrial factor, which has many uses; but it bas one vital function you might never even notice. Sand cushions our land from the sea’s impact,【B11】______. [br] 【B10】
Sand covers not just sea-shores, but also ocean beds, deserts and mountains. It is one of the most common substances on earth. And it is a (26) major element in man-made materials too—(27) concrete is largely sand, while glass is made by melting sand and some other elements.
What exactly is sand? In fact, according to the most generally (28) accented scheme of measurement, devised by the Massachusetts Institute of Technology, grains qualify as sand if their (29) diameter is greater than 0.06 of a millimeter and less than 0.6 of a millimeter.
Depending on its age and (30) origin, particular sand can consist of tiny pebbles or porous granules. Its grains may have the shape of (31) stars or spirals, their edges jagged or smooth; They have come from the (32) erosion of rocks, or from the skeletons of marine organisms, which accumulate on the (33) bottom of the oceans, or even from volcanic eruptions.
Usually, the older the granule, (34) the finer they are and the smoother their edges. The fine, white beaches of northern Scotland, for instance, are recycled from sandstone several hundred million years old. (35) Perhaps they will be stone once more. in another few hundred million years.
Sand is an irreplaceable industrial factor, which has many uses; but it has one vital function you might never even notice. Sand cushions our land from the sea’s impact, (36) and geologists say it often does a better lob of protecting, our shores than the most advanced coastal technology.
选项
答案
Perhaps they will be stone once more, in another few hundred million years
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3461661.html
相关试题推荐
Sandcoversnotjustsea-shores,butalsooceanbeds,desertsandmountains.
Sandcoversnotjustsea-shores,butalsooceanbeds,desertsandmountains.
Sandcoversnotjustsea-shores,butalsooceanbeds,desertsandmountains.
Sandcoversnotjustsea-shores,butalsooceanbeds,desertsandmountains.
Sandcoversnotjustsea-shores,butalsooceanbeds,desertsandmountains.
Sandcoversnotjustsea-shores,butalsooceanbeds,desertsandmountains.
Sandcoversnotjustsea-shores,butalsooceanbeds,desertsandmountains.
Sandcoversnotjustsea-shores,butalsooceanbeds,desertsandmountains.
Sandcoversnotjustsea-shores,butalsooceanbeds,desertsandmountains.
Sandcoversnotjustsea-shores,butalsooceanbeds,desertsandmountains.
随机试题
[audioFiles]audio_eusz200712_001(20091)[/audioFiles]A、Toprotectherfromgetti
TheAmericanideaofrespectinghumanrightscamefromseveralsources.Fir
习近平总书记在文艺工作座谈会上的讲话提出在社会主义核心价值观中,最深层、最根本、
()属于反向市场。A、期货价格高于现货价格 B、期货价格低于现货价格 C、
主要功能是教育培养人才的组织是A药学教育和科研组织 B事业性药房组织 C药事
企业在成立初期,培训力量应集中于( )。A.组建管理团队 B.提高创业者的营
期货交易的当日收盘价格即为当日结算价。()
波形和频率等物理学特性影响。下列匹配中错误的包括()。多选A.响度一振幅
能诱导UDP-葡萄糖羧基转移酶合成从而减轻黄疸的药物是A.阿司匹林 B.青霉素
在建设工程施工过程中,因施工单位原因造成实际进度拖延,监理工程师确认施工单位修改
最新回复
(
0
)