首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Sand covers not just sea-shores, but also ocean beds, deserts and mountains. It is one of the most common substances on earth. A
Sand covers not just sea-shores, but also ocean beds, deserts and mountains. It is one of the most common substances on earth. A
admin
2012-12-13
30
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】______.
【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://kaotiyun.com/show/hDw7777K
0
大学英语四级
相关试题推荐
Theconceptofstudentexchangebetweencountriesisnotanewone.Itisacommon【B1】______inmanyEuropeancountriesandtheU
Theconceptofstudentexchangebetweencountriesisnotanewone.Itisacommon【B1】______inmanyEuropeancountriesandtheU
Theconceptofstudentexchangebetweencountriesisnotanewone.Itisacommon【B1】______inmanyEuropeancountriesandtheU
Theconceptofstudentexchangebetweencountriesisnotanewone.Itisacommon【B1】______inmanyEuropeancountriesandtheU
Theconceptofstudentexchangebetweencountriesisnotanewone.Itisacommon【B1】______inmanyEuropeancountriesandtheU
Mostcollegesbelievestudentsshould______totuitioncosts,somethingthatiscommonelsewhereintheworldbutwouldmarka
A、Theyoungmanhadsomeunusualproblems.B、Theproblemiscommonforyoungpeople.C、It’snotcommonforyoungmentoleaveho
A、Onlyifwehavemuchincommon.B、Onlyifweknowourfriends’mistakes.C、Onlyifwetreatourdisagreementswisely.D、Onlyi
A、Congress.B、Thecentralbank.C、TheFederalReserve.D、Commonpeople.C细节辨认题。短文中提到,国会还同意成立消费者金融保护局,但是资金由美联储支付。
随机试题
热力学第一定律的含义及意义是什么?
以下法律属于实体法的是
昏迷患者的损害部位
一幅地形图上,等高线越稀疏,表示地貌()。
目标评价的常用分析方法包括()。
根据营业税法律制度的规定,下列各项中,应按“转让无形资产”税目征收营业税的有()。
坚守岗位的基本要求是()。
教师成长与发展的基本途径主要有两个方面,一方面是通过师范教育培养新教师作为教师队伍的补充,另一方面是通过实践训练提高在职教师。()
结合犯罪构成理论和刑法分则规定,下列情形中构成侵占罪的是()。
Manyteachersbelievethattheresponsibilitiesforlearningliewiththestudent.(1)_____alongreadingassignmentisgiven,i
最新回复
(
0
)