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
2023-07-17
43
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] 【B4】
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
diameter
解析
转载请注明原文地址:https://tihaiku.com/zcyy/2845391.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
Whatcourseisthestudentinterestedin?[br][originaltext]R:Goodmorning.C
HowtoReducePresentationStress1.Causesofpresentationstress■Fearofbei
SubfieldsofLinguisticsI.SociolinguisticsFocusingo
餐馆建筑设计 任务书与解答 任务书 设计题目:餐馆建筑设计 任务耍
对一,二级抗震等级钢筋混凝土结构中钢筋分项质量验收,下列说法中正确的有()。A、
国家发展中医药的方针、政策是A:优先发展中药原则B:中西医并重的方针,鼓励中西
国家教育助学贷款包括()和财政贴息的国家助学贷款两种。A:商业性银行助学贷款B
某公司产品售价比竞争对手略低,市场占有率第_,适合该企业的企业文化包括()。
二、(81~100题)工业管道、静置设备和工艺金属结构工程安装 在相同容积和相
强制电流阴极保护系统施工时,其阳极四周应填充( )填充料。A.沙土 B.焦炭
最新回复
(
0
)