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
2025-03-18
38
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/4003027.html
相关试题推荐
Lifeneartheshoreeverywhereisaffectedbythetides,whichcomeandgot
Lifeneartheshoreeverywhereisaffectedbythetides,whichcomeandgot
Lifeneartheshoreeverywhereisaffectedbythetides,whichcomeandgot
Would-belanguageteacherseverywherehaveonethingincommon;theyallwan
【B1】[br]【B3】A、playedB、workedC、operatedD、affectedB文章中国王尝试了各种治疗方式,但是都不起作用。所以
如果到处都太拥挤,旅行会令人很不愉快。Ifitistoocrowdedeverywhere,travelwillbeveryunpleasan
Therewasonethoughtthatairpollutionaffectedonlytheareaimmediately
Therewasonethoughtthatairpollutionaffectedonlytheareaimmediately
Therewasonethoughtthatairpollutionaffectedonlytheareaimmediately
Themedicineisonsaleeverywhere.Youcangetitat______chemist’s.A、otherB
随机试题
Mycenaestrandsonahillskirtedbytwodeepravines.Thesiteisanatural
Whentheyadviseyourkidsto"getaneducation"ifyouwanttoraiseyouri
下列作家属于“永嘉四灵”的有()A.陈与义 B.刘克庄 C.翁卷 D.史
软交换将PSTN的可靠性和数据网的灵活性很好地结合起来,是新兴运营商进入话音市场
一系列网络热点事件_网络管理应进一步_,加大财力和人才的投入,加快完善立法。
A.2 B.5 C.11 D.15
丁某是某重点中学高三年级学生,近一段时间以来,一直情绪不好,每天在家闷闷不乐不愿
程序教学
港航工程施工合同规定双方保险义务,( )的投保一般在合同专用条款中约定由甲方承
影响混凝土强度的因素主要有原材料及生产工艺方面的因素。其中原材料方面的因素包括(
最新回复
(
0
)