首页
登录
职称英语
How to Get Preserved as a Fossil (66) Unfortunately the
How to Get Preserved as a Fossil (66) Unfortunately the
游客
2025-05-03
30
管理
问题
How to Get Preserved as a Fossil
(66)
Unfortunately the changes of any animal become a fossil are not very great, and
(67)
the chances of a fossil then being discovered many thousand of years later are even less.
(68)
It is not surprising that all the millions of animals that have lived in the past,
(69)
we actually have fossils of only very few
.
(70)
There are several ways into which animals and plants may become fossilized.
(71)
First, it is essential that the remains are buried, as though dead animals and plants are quickly destroyed.
(72)
If they remain exposed the air.
Plants rot, while insects and hyenas eat the flesh and bones of animals. (73)
Finally, the few remaining bones soon disintegrate the hot sun and pouring rain.
If buried in suitable conditions, however, animal and plant remains will be preserved. (74)
The same chemicals change sand and silt into hard rock will also enter the animal and plant remains and make them hard too.
(75)
When this happens, we say that they become fossilized.
[br]
选项
答案
(they) have (become)
解析
转载请注明原文地址:https://tihaiku.com/zcyy/4060119.html
相关试题推荐
HowtoGetPreservedasaFossil(66)Unfortunatelythe
HowtoGetPreservedasaFossil(66)Unfortunatelythe
HowtoGetPreservedasaFossil(66)Unfortunatelythe
HowtoGetPreservedasaFossil(66)Unfortunatelythe
HowtoGetPreservedasaFossil(66)Unfortunatelythe
Forscientistswhostudyhumanevolution,fossilremainsprovidetheonlydi
Forscientistswhostudyhumanevolution,fossilremainsprovidetheonlydi
Forscientistswhostudyhumanevolution,fossilremainsprovidetheonlydi
Forscientistswhostudyhumanevolution,fossilremainsprovidetheonlydi
Unfortunatelynotallofusobtainourjust______inthislife.A、demandsB、gains
随机试题
[originaltext]M:Hello!ThisisJackSmithfromABCcompany.MayIspeaktoMr.G
Careeristsarepeoplewhoseself-imageisdeterminedalmostexclusivelybyt
Apolygonwithfoursidesandfourrightangleshasonesideof6mm.Iftheare
Themusicarousedan__feelingofhomesicknessinhim.A、intrinsicB、intentional
下列不属于控制器内部故障的现象有()。A.主电故障 B.模块故障 C.总线
党的十八大提出培养社会主义核心价值观,从个人层面上来说,社会主义核心价值观包括(
许多企业在“5S”管理基础上增加了()和节约两个活动,构成了“7S”活动。A:整
现行版《中国药典》规定,肠溶胶囊做崩解时限检查时应A.先在浓盐酸溶液中检查2h
我国股票市场最重要的组成部分是()。A、主板市场 B、中小企业板市场
下列关于培训与开发方法中的管理游戏法的陈述,错误的是( )。A.实施费用较低
最新回复
(
0
)