首页
登录
职称英语
Life near the shore everywhere is affected by the tides, which come and go t
Life near the shore everywhere is affected by the tides, which come and go t
游客
2025-03-21
4
管理
问题
Life near the shore everywhere is affected by the tides, which come and go twice each day in a cycle of about twelve-and-a-half hours—just different enough from the daily cycle of the sun so that there can be no regular relationship between the shore being alternately wet and dry and alternately light and dark. The extent of the tides varies greatly, from as little as one foot in inland seas like the Mediterranean, to fifty feet or so in the Bay of Fundy in Nova Scotia. In some parts of the world, one of the two daily tides rises higher and falls lower than the other; and tides at the time of new moon and full moon are generally greater than at other times. The extent of the intertidal zone thus varies from day to day as well as from place to place.
The kinds of organisms living in the region between the tidal limits depend very much on whether the shore is rocky, sandy, or muddy. Rocky shores have the most obviously rich faunas (某地区所有的动物),because of the firm anchorage for both animals and plants, and because of the small pools left by the retreating seas. Sandy shores, especially when exposed to surf (as they usually are), have the fewest kinds of animals. [br] The two tides in a given day______.
选项
A、never vary in extent
B、may vary in extent
C、only vary in extent at the time of a new moon or a full moon
D、always vary in extent
答案
B
解析
文中第一段第三句说:“在世界一些地方,一天中两次潮汐中的一次会比另一次上涨得高一些,而回落得低一些。”由此可知,在给定的一天中两次潮汐在规模上也许会有变化。
转载请注明原文地址:https://tihaiku.com/zcyy/4006653.html
相关试题推荐
Lifeneartheshoreeverywhereisaffectedbythetides,whichcomeandgot
Lifeneartheshoreeverywhereisaffectedbythetides,whichcomeandgot
Lifeneartheshoreeverywhereisaffectedbythetides,whichcomeandgot
Lifeneartheshoreeverywhereisaffectedbythetides,whichcomeandgot
Lifeneartheshoreeverywhereisaffectedbythetides,whichcomeandgot
Lifeneartheshoreeverywhereisaffectedbythetides,whichcomeandgot
Lifeneartheshoreeverywhereisaffectedbythetides,whichcomeandgot
Lifeneartheshoreeverywhereisaffectedbythetides,whichcomeandgot
Would-belanguageteacherseverywherehaveonethingincommon;theyallwan
Would-belanguageteacherseverywherehaveonethingincommon;theyallwan
随机试题
Fillalltheholeswith______firstbeforeyoupaintthewall.A、perfumeB、greas
Onaverage,Americankidsaged3to12spent29hoursaweekinschool,eigh
Doeswinningmeaneverything?Askkidsandtheanswerisprobably"No".Ask
Scandalsarerootedintest-basedsystems;theyexistwithorwithoutfraud.
如果后牙缺牙间隙垂直距离或者近远中径较小,可以考虑使用的修复失牙的方法为(
甲公司以定向增发股票的方式购买同一集团内另一企业持有的A公司80%股权。为取得该
数字中国,催动发展蝶变 垃圾分类绿色能量生成机,雕塑AR合影,云
金融市场最基本、最重要的功能是( )。A.融通货币资金 B.资源配置 C.
图8—1是资产组合价值变化△Π的概率密度函数曲线,其中阴影部分表示( )。
一般资料:求助者,男性,24岁,在读研究生。 案例介绍:求助者研究生入学后不久
最新回复
(
0
)