首页
登录
职称英语
Where the Galapagos Islands lie today, there was once an unbroken expanse of
Where the Galapagos Islands lie today, there was once an unbroken expanse of
游客
2025-03-24
6
管理
问题
Where the Galapagos Islands lie today, there was once an unbroken expanse of Pacific. Then the sea began to seethe and simmer, the earth’s crust was pierced, and matter gushed forth continuously. Lava and scoriae (loose, cinderlike lava) piled up until one day spewing volcanoes raised peaks above the brawling sea.
Many thousands of years passed before life could settle upon the cooled land. Then wind and waves brought the first hardy seed of primitive plants. After these came others, then insects, lizards , and birds. The chance that any animal would survive the trip from the South American continent more than six hundred miles away was slight; only a few hardy species came through alive. This is why there are many gaps in the animal life of the islands.
Those that did reach the out-of-the-way islands developed over the ages into a number of quite peculiar forms. Because conditions in the Galapagos differed from those in their original homes, the animals had to change or perish. Only in the Galapagos are there seaweed-eating marine lizards, giant tortoises, and flightless cormorants. In fact, most of the species found in the Galapagos Islands are endemics: they exist only in the archipelago. [br] There are gaps in the animal life today because______.
选项
A、some species were killed off by others
B、many species left the Galapagos Islands
C、few species reached the islands
D、South America is more than 600 miles away
答案
C
解析
文中第二段第五句说:“这就是为什么岛上的动物存在着许多差异。”原因解释在第二段第四句中。所以C为正确答案。
转载请注明原文地址:https://tihaiku.com/zcyy/4011033.html
相关试题推荐
WheretheGalapagosIslandslietoday,therewasonceanunbrokenexpanseof
WheretheGalapagosIslandslietoday,therewasonceanunbrokenexpanseof
WheretheGalapagosIslandslietoday,therewasonceanunbrokenexpanseof
WheretheGalapagosIslandslietoday,therewasonceanunbrokenexpanseof
WheretheGalapagosIslandslietoday,therewasonceanunbrokenexpanseof
Theremarkable______oflifeontheGalopagosIslandsinspiredCharlesDarwinto
WheretheGalapagosIslandslietoday,therewasonceanunbrokenexpanseof
WheretheGalapagosIslandslietoday,therewasonceanunbrokenexpanseof
WheretheGalapagosIslandslietoday,therewasonceanunbrokenexpanseof
WheretheGalapagosIslandslietoday,therewasonceanunbrokenexpanseof
随机试题
Warning:Holdingacellphoneagainstyourearorstoringitinyourpocket
Manyworkersdependonplans【B1】bytheiremployerstohelppayfortheirre
脑膜中动脉穿过的孔裂是( )A.圆孔 B.卵圆孔 C.棘孔 D.枕骨大孔
在“有理数的加法”一节中,对于有理数加法的运算法则的形成过程,两位教师的一些教学
金融中介机构积极参与金融衍生工具的发展,主要原因有( )。 Ⅰ.金融机构可以
Thechangeinthatvillagewasmiraculou
智能变电站一体化监控系统数据采集应包括()。(A)应包括电网运行数据、设
下列选项中,符合所给图形的变化规律的是________。
关于架空电话线路规划的表述中,错误的有()。A.架空电话线路的路由要求短捷
投资项目决策分析与评价的基本要求包括贯彻落实科学发展观、资料数据准确可靠和()
最新回复
(
0
)