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
40
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
(1)"LikeFlorenceintheRenaissance."ThatisacommondescriptionofwhatitisliketoliveinSiliconValley.America’st
A、Tolookintothementalhealthofoldpeople.B、Toexplainwhypeoplehavenegativeviewsonoldage.C、Tohelpcorrectsomef
ThingstobeTaughtinEverySchoolI.Introduction:Importanceofstudents’abilitytodealwiththerealworld.A.Speaker
ThingstobeTaughtinEverySchoolI.Introduction:Importanceofstudents’abilitytodealwiththerealworld.A.Speaker
(1)"LikeFlorenceintheRenaissance."ThatisacommondescriptionofwhatitisliketoliveinSiliconValley.America’s
(1)"LikeFlorenceintheRenaissance."ThatisacommondescriptionofwhatitisliketoliveinSiliconValley.America’s
WhathasbeenhappeningtoKraft?
WhyisSarahworried?
随机试题
以下叙述中正确的是()。
设市场上每年对某厂生产的18寸彩色电视机的需求量是随机变量X(单位:万台),它均匀分布于[10,20],每出售一万台电视机,厂方获得利润50万元,但如果因销售不出而积压在仓库里,则每一万台需支付保养及其他各种损失费用10万元,问:18寸彩色电视机的年产量应
女性,68岁。原有肺心病病史。受凉后发热伴咳脓痰,发绀加重,次日神志模糊,嗜睡,血压12.0/9.0kPa,无病理反射。血气分析检查结果为:pH7.56,PaO27.33kPa(55mmHg),PaCO29.33kPa(70mmHg),HCO3-48m
患者,女性,23岁。1周前受凉感冒,未予特殊治疗。近日出现胸闷、心悸,心电图示窦性心律,频发室早,心率106次/分,体温36.5℃,血压100/60mini{g,听诊:第一心音低钝,未闻及明显杂音,怀疑病毒性心肌炎收入院。目前该病员应该
主动脉听诊区闻及收缩期喷射样杂音,向颈部传导,最可能的诊断是
下列不属于蒙药传统剂型的是()。
甲将自家的房产同时向乙、丙和丁作了抵押,其中,乙的抵押没有登记。后来由于不能按时偿还债务,房产被拍卖,共收入15万元,则以下表述正确的是()。
下列关于甲公司债务重组时的会计处理中,正确的是( )。20×6年末甲公司对固定资产进行改造时应转入在建工程的金额为( )万元。
Goodevening,ladiesandgentlemen!Firstofall,I’dliketo【B1】______asincerewelcometoyouall,thenewcomersofourc
A、Tobookatableforlunch.B、Tobookanairticket.C、Tomakeanappointment.D、Toasksomebodyforhelp.A
最新回复
(
0
)