首页
登录
职称英语
Sometimes the biggest finds are the smallest finds. Researchers examining a(
Sometimes the biggest finds are the smallest finds. Researchers examining a(
游客
2024-02-11
52
管理
问题
Sometimes the biggest finds are the smallest finds. Researchers examining a(26)______of siltstone(粉砂岩)taken from ground along the Beardmore glacier(冰川)in Antarctica found something(27)______. They found a fly. Well, not exactly a fly. They found a fly (28)______—it’s a segment of the protective shell of a fly worm. While the worms are still growing, they are(29)______by a thin shell. And where there’s worm shell, there are flies. So what are flies doing in Antarctica? It’s much too cold there for flies. And the closest(30)______location, South America, is thousands of miles away.
Part of the answer is that the fly fossil is(31)______—it was found with a number of other fossilized things that have been dated between three million and seventeen million years old. It’s possible that the fly lived during a period when sea(32)______were much lower there than they now are. Lower sea levels means wider continents—think of standing on the (33)______of a beach and having the water pull back.(34)______ . Or maybe not. Maybe flies are much older than anyone thought.(35)______. But that was around eighty million years ago, and flies aren’t thought to be that old.
Whatever the answer is, something in our understanding of the continents, the seas, or fly evolution has to be fixed.(36)______ [br] (27)
Sometimes the biggest finds are the smallest finds. Researchers examining a(26)segment of siltstone(粉砂岩)taken from ground along the Beardmore glacier(冰川)in Antarctica found something(27)unexpected. They found a fly. Well, not exactly a fly. They found a fly(28)fossil—it’s a segment of the protective shell of a fly worm. While the worms arc still growing, they are(29)protected by a thin shell. And where there’s worm shell, there are flies. So what are flies doing in Antarctica? It’s much too cold there for flies. And the closest(30)fly-friendly location, South America, is thousands of miles away.
Part of the answer is that the fly fossil is(31)ancient —it was found with a number of other fossilized things that have been dated between three million and seventeen million years old. It’s possible that the fly lived during a period when sea(32)levels were much lower there than they now are. Lower sea levels means wider continents—think of standing on the(33)edge of a beach and having the water pull back.(34)And wider continents means it’s more likely that living things might travel across the gap. Or maybe not. Maybe flies are much older than anyone thought.(35)We know that what we now call Antarctica was once connected to both South America and Australia. But that was around eighty million years ago, and flies aren’t thought to be that old.
Whatever the answer is, something in our understanding of the continents, the seas, or fly evolution has to be fixed.(36)That’s one of the best things about science—a really big change can come from the discovery of something really small.
选项
答案
unexpected
解析
转载请注明原文地址:https://tihaiku.com/zcyy/3440105.html
相关试题推荐
DemandsforstrongerprotectionforwildlifeinBritainsometimeshidethef
Sometimes,anoldstorycouldbesomeaningfulthatpeoplecanlearnalotfrom
Sometimes,anoldstorycouldbesomeaningfulthatpeoplecanlearnalotfrom
Sometimes,anoldstorycouldbesomeaningfulthatpeoplecanlearnalotfrom
Sometimes,anoldstorycouldbesomeaningfulthatpeoplecanlearnalotfrom
Sometimes,anoldstorycouldbesomeaningfulthatpeoplecanlearnalotfrom
Sometimes,anoldstorycouldbesomeaningfulthatpeoplecanlearnalotfrom
[originaltext]Mensometimessay:"Wearebetterandclevererthanwomen.Wo
[originaltext]Mensometimessay:"Wearebetterandclevererthanwomen.Wo
Problemswithchildcareremainthebiggest______towomensucceedingatwork.A、
随机试题
Theterm“qualityoflife”isdifficulttodefine.It【C1】______averywidesco
TogetherwithHurricaneElida,therehavebeen______stormsinthisseason.[or
Peoplearebeinglured(引诱)ontoFacebookwiththepromiseofafun,freese
龈上边缘的主要优点是A.边缘密合 B.美观 C.牙周刺激小 D.不宜菌斑附
图示电路,D触发器完成的逻辑功能是()。
设z=f(x2-y2),则dz等于: A.2x-2yB.2xdx-2y
下面是某求助者的WAIS一RC的测验结果: 该求助者的总体智力等级是(
D
(2017年真题)当构造应力分布较均匀且强度足够时,在岩体中形成张开裂隙,这种裂
患者,女性,66岁,在地上滑倒,造成股骨近端骨折,行X线片确诊。那么下列骨折类型
最新回复
(
0
)