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
25
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] 【B5】
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
origin
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3461656.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
RogerRosenblatt’sbookBlackFiction,inattemptingtoapplyliteraryrat
[img]2012q2/ct_eyyjscz2010a_eyyjscreada_0157_20122[/img][br]Shortbreaksarea
TheDrugsDon’tWorkA)Seve
Itcansometimesfeelliketheworldisverynoisy—fromplanesarchingloudly
Childrenaregettingsofattheymaybethefirstgenerationtodiebeforet
[originaltext]Goodmorning,everyone.First,I’dliketoaskyouaquestion
A.在正常咀嚼运动中,咀嚼食物的力大约只为牙周组织所能支持的力量的一半,而在牙周
根据有效市场理论,下列属于证券市场外在效率衡量因素的有( )。A、与证券有关的信
从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性: A.如
某宗房地产交易的成交价格为300万元人民币,其中首期支付30%,余款在一年后一次
最新回复
(
0
)