首页
登录
职称英语
[originaltext] Scientists say sharks have lived in the world’s oceans for mi
[originaltext] Scientists say sharks have lived in the world’s oceans for mi
游客
2023-09-10
71
管理
问题
Scientists say sharks have lived in the world’s oceans for millions of years. Scientists say there are more than three- hundred –fifty different kinds of sharks.
Sharks do not have bones, and a shark has an extremely good sense of smell. It can find small amounts of substances in the water, such as blood, body liquids and chemicals produced by animals. Sharks also sense electrical and magnetic power linked to nerves and muscles of living animals. These powerful senses help them find their food. Some sharks will eat just about anything. Many unusual things have been found in the stomachs of some tiger sharks. They include shoes, dogs, a cow’s foot and metal protective clothing.
About forty percent of the different kinds of sharks lay eggs. The others give birth to live young. Some sharks carry their young inside their bodies like humans do.
Scientists are beginning to understand the importance of sharks to humans. Medical researchers want to learn more about the shark’s body defense system against disease. They know that sharks recover quickly from injuries. Sharks appear never to suffer infections, cancer or heart diseases.
选项
A、Bone structure.
B、Smell ability.
C、Birth mode.
D、Recover ability against disease.
答案
C
解析
相关句子:“Some sharks carry their young inside their bodies like humans do.”可以看出部分鲨鱼的生育方式与人类一样。
转载请注明原文地址:https://tihaiku.com/zcyy/3001863.html
相关试题推荐
[originaltext]Ifwinningiseverything,Britishscientistshavesomeadvice
[originaltext]Ifwinningiseverything,Britishscientistshavesomeadvice
[originaltext]Scientistssaythatmostdoctorsandpatientsalreadyknowwh
[originaltext]Microsofthasbeenforcedtoacknowledgethatasubstantialn
[originaltext]Microsofthasbeenforcedtoacknowledgethatasubstantialn
[originaltext]W:CongratulationsonyoursecondalbumLoveIsMyReligion.M:T
[originaltext]W:CongratulationsonyoursecondalbumLoveIsMyReligion.M:T
[originaltext]W:CongratulationsonyoursecondalbumLoveIsMyReligion.M:T
[originaltext]W:Excuseme,IwanttomakethreereservationsonFlight732for
[originaltext]W:Excuseme,IwanttomakethreereservationsonFlight732for
随机试题
FrictionbetweenAmerica’smilitaryanditscivilianoverseersisnothingne
Oneofthemostextensiverecentstudiesoffamilyviolence,conductedbyth
粉末中可见草酸钙方晶众多,表面灰黑色或棕黑色的药材是()。 A.灵芝 B.茯
下列抗高血压药中能耗竭神经末梢囊泡内递质的是A.维拉帕米 B.可乐定 C.利
关于赔偿金额的确定,我国《海商法》规定,计算货物的实际价值包括( )。A.货物
现货交易者采取“期货价格+升贴水”方式确定交易价格时,主要原因为期货价格具有(
根据《刑事诉讼法》及司法解释规定,经法院通知,证人没有正当理由不出庭作证的,法院
下列车辆中,免征车船税的有( )。A.纯电动商用车 B.插电式混合动力汽车
根据支付结算法律制度的规定,下列关于汇兑业务办理的表述中,正确的是()。A.汇
某重要的三级旅游公路设计速度为40km/h起讫桩号K0+000~K8+300项目
最新回复
(
0
)