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关于耳道识别技术,这段文字没有涉及:
A.适用范围B.声学原理C.生理基础D.工作方式
【参考答案】A。解析:“耳机发出的声波进入外耳道的鼓膜,到中耳、内耳,再反射回鼓膜,形成的声学共振频谱在人与人之间具有个体差异,可以通过样本匹配并判断使用者的身份”介绍的是“声学原理”和“工作方式”;“这种识别技术是基于耳道孔构造的唯一性”介绍的是“生理基础”。“适用范围”在文段中没有提及,故本题答案选A。
“紧跟热点”考题
下列关于航天器的说法正确的是:
A.“风云”系列气象卫星通过光纤实现与地面的数据传输
B.“玉兔”号月球车在月球上行走的动力驱动是电动机
C.“长征一号”属于二级运载火箭
D.“北斗二号”属于通信广播卫星
【参考答案】B。解析:本题主要是考查科技常识中的近现代重大科技成就。首先A项卫星通讯是将地面发射站的数据以高频电磁波形式通过卫星的中专传输到一定覆盖范围的地面接收器上,不是通过光纤实现与地面的数据传输,错误。C项“长征一号”属于是为发射我国第一颗人造地球卫星东方红一号而研制的三级运载火箭,题干中是二级运载火箭,错误。D项“北斗二号”是卫星导航系统,同时具备通信功能,但不是通信广播卫星,错误。本题正确答案为C。
“数量关系”考题
某人出生于20世纪70年代,某年他发现从当年起连续10年自己的年龄均与当年年份数字之和相等(出生当年算0岁)。问他在以下哪一年时,年龄为9的整数倍?
A.2006B.2007C.2008D.2009
【参考答案】D。解析:因为“从当年起连续10年自己的年龄均与当年年份数字之和相等”,则其中必有一个年份与年龄均能被9整除,即各位数字之和能被9整除,则年龄又被9整除时,年份也能被9整除,结合选项,只有B符合,选B。
责任编辑:穆启春 CN063
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