首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
Which is NOT correct description about Medullary bone?
Which is NOT correct description about Medullary bone?
admin
2010-01-06
63
问题
Which is NOT correct description about Medullary bone?
Scientists have discovered evidence that a dinosaur found in Montana was a female. Scientists have never before been able to reliably determine the sex of fossilized dinosaurs. The latest discovery gives them a tool to identify at least some females. What they found was a layer of something called medullary bone inside the thighbone of a dinosaur dug up five years ago. Scientists had cut the bone into two pieces to get it into a helicopter. Medullary bone is only known in ovulating birds, it’s a source of calcium that birds draw to make shells for their eggs. Writing in the journal Science, the scientific team believes the bone layer could be a way to identify other female dinosaurs but only if they died while making eggs and were then fossilized. They point out that the discovery confirms the view that modem birds are the closest living relatives of the two-legged dinosaurs.
选项
A、Modem birds are the closest living relatives of the two-legged dinosaurs.
B、Dinosaurs have medullary bone.
C、Medullary bone is only known in ovulating birds.
D、Medullary bone is a source of calcium for birds to make shells for their eggs.
答案
A
解析
本题考查对新闻细节的捕捉。根据文中原文"What they found was a layer of something called medullary bone inside the thighbone of a dinosaur dug up five years ago.”可知科学家们在恐龙化石中发现了一层脊髓骨。接着说明只在产卵的鸟类中发现过这种物质,选项A正确。另外说明脊髓骨是鸟类吸取形成鸟壳的钙质的主要来源。由此可知,脊髓骨中必定富含钙质,选项B、 C均正确。因此只有选项D的说法不正确,为本题答案。
转载请注明原文地址:https://kaotiyun.com/show/My6K777K
0
专业英语四级
相关试题推荐
TheroleofeyecontactinaconversationalexchangebetweentwoAmericansiswelldefined;speakersmakeacontactwiththeey
TheroleofeyecontactinaconversationalexchangebetweentwoAmericansiswelldefined;speakersmakeacontactwiththeey
ThingstobeTaughtinEverySchoolI.Introduction:Importanceofstudents’abilitytodealwiththerealworld.A.Speaker
ThingstobeTaughtinEverySchoolI.Introduction:Importanceofstudents’abilitytodealwiththerealworld.A.Speaker
ThingstobeTaughtinEverySchoolI.Introduction:Importanceofstudents’abilitytodealwiththerealworld.A.Speaker
ThingstobeTaughtinEverySchoolI.Introduction:Importanceofstudents’abilitytodealwiththerealworld.A.Speaker
(1)"LikeFlorenceintheRenaissance."ThatisacommondescriptionofwhatitisliketoliveinSiliconValley.America’s
FiveVirtuesofStyleI.Correctness—Followcorrectusageofwords,grammarand【T1】______rules—Reasons
FiveVirtuesofStyleI.Correctness—Followcorrectusageofwords,grammarand【T1】______rules—Reasons
随机试题
债券基金的收益受市场利率的影响正确的是()。
()抽油机井热洗是为了防止蜡晶体在油管壁附着、聚集、长大而堵塞油管,影响油井正常生产的一种井筒加热措施。
姚纳的双重苦恼是什么?这段文字与前文构成何种关系?
朱砂安神丸治疗心悸最适用于
患者,女,26岁。孕2产1。现孕40周,来院途中分娩,总产程1小时,产后5天出现寒战、高热、下腹痛无乳胀及腹泻。妇科检查:阴道内有脓血,宫颈轻压裂伤,子宫大而软,压痛明显。首先考虑为
根据上述条件,估价人员适合选择的估价方法有()。根据上述条件,在开发完成后,该宗地土地无限年期最可能实现的价值是()。
论述孙中山南京临时政府在法制建设上的建树。
标识符在高级语言源程序中的作用不包括_____________。
若a是int型变量,则表达式(a=2*3,a*2),a+6的值为______。
Entertheinformationage.Informationistherawmaterialformanyofthebusinessactivities【C1】______thisnewera,justasir
最新回复
(
0
)