首页
登录
职称英语
The blue of the sea is caused by the scattering of sunlight by tiny particle
The blue of the sea is caused by the scattering of sunlight by tiny particle
游客
2024-01-01
61
管理
问题
The blue of the sea is caused by the scattering of sunlight by tiny particles suspended in the water. Blue light, being of short wavelength, is scattered more efficiently than light of longer wavelengths. Although waters of the open ocean are commonly some shade of blue, green water is commonly seen near coasts, especially in tropical or subtropical regions. This is caused by yellow pigments being mixed with blue water. Phytoplankton are one source of the yellow pigment. Other microscopic plants may color the water brown or brownish-red. Near the shore, silt or sediment in suspension can give water a brownish hue. Outflow of large rivers can often be observed many miles offshore by the coloration of suspended soil particles.
Marine phytoplankton (Greek for "plant wanderers") are microscopic single-celled plants that include diatoms, dinoflagellates, coccolithophorids, green algae, and blue-green algae, among others. The growth of these organisms, which photosynthesize light, depends on a delicate balance of nutrient enrichment via vertical mixing, which is often limited by the availability of nitrogen and light. Diatoms are one-celled plants with patterned glass coverings. Each glass, or silicon dioxide box, is ornamented with species-specific designs, pits, and perforations making them popular with microscopists and, more recently, electron scanning microscopists. [br] The main idea of this passage is that ______.
选项
A、light causes sea color
B、sea coloration is varied because of a combination of length of light waves and microscopic plant life and silt
C、microscopic plant life causes sea color
D、water composition causes sea color
答案
B
解析
主旨题型。阅读全文得知,海水颜色的变化是由许多因素决定的;包括选项A、C、D,而选项B是它们的综合,所以是答案。
转载请注明原文地址:https://tihaiku.com/zcyy/3325290.html
相关试题推荐
Althoughsunlightappearswhite,______actuallyacombinationofallthecolorso
WhenAthesunissettinginShanghai,NewYorkBisjustemergingCintosunlight
Theblueoftheseaiscausedbythescatteringofsunlightbytinyparticle
Theblueoftheseaiscausedbythescatteringofsunlightbytinyparticle
Theblueoftheseaiscausedbythescatteringofsunlightbytinyparticle
Theblueoftheseaiscausedbythescatteringofsunlightbytinyparticle
Theblueoftheseaiscausedbythescatteringofsunlightbytinyparticle
Theblueoftheseaiscausedbythescatteringofsunlightbytinyparticle
Hisfailure______greatdisappointmentstohisparents.A、forcedB、causedC、made
Thestormhascaused______tothisregion.A、manydamagesB、muchdamagesC、muchda
随机试题
Auctionsarepublicsalesofgoods,conductedbyanofficiallyapprovedaucti
Cultureisactivityofthought,andreceptivenesstobeautyandhumanefeeli
Doyouwakeupeverydayfeelingtootired,orevenupset?Ifso,thenanew
【S1】[br]【S2】underestimate此句为think的宾语从句,又由and来连接,后面的意思是“忘记了他们年轻时的感受”,前面是父母对十几岁的
Whatkindofcarwillwebedrivingin2010?Rather【S1】______fromthetypewekn
队列研究属于以下哪种流行病学研究方法()A.描述性研究 B.分析性研究
内异症患者不孕率高达A.20% B.30% C.40% D.50% E.
下列关于表现分布容积的说法,错误的是A.通常用V=X0/C0表示。X0表示体内
(2020年真题)甲有限责任公司为增值税一般纳税人,2019年9月,该公司
某建筑安装工程营业税的税额为营业额的3%城市维护建设税为营业税的5%,教育费附
最新回复
(
0
)