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] 【B3】
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
accepted
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3461654.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
TheSupremeCourtwillhearargumentstodayabouttheuseofpublicmoneyfo
Itmaycomeasasurprisetomanyanexhaustedmotherorfather—butthi
复现性测量条件不包括()。A:不同的样品 B:不同设备 C:不同地点 D
脊髓空洞症的感觉障碍常常是A.神经干型 B.末梢型 C.分离型 D.后根型
复苏后防治脑水肿首选的脱水剂()A.30%的尿素液 B.20%的甘露醇液
系统一般被规定为有组织的和被组织化的全体。系统论反映了唯物辩证法中()。A.否定
双重交易机制是()的重要特征。 A.存托凭证B.证券交易所交易基金
“物质化”过程
(2020年真题)下列权利中,属于用益物权的是( )。A.地役权 B.宅基地
建设项目地下水环境现状监测的目的有( )。A.了解地下水化学类型 B.了解地下
最新回复
(
0
)