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【单选题】
关于网络操作系统的描述中，错误的是( )。A.
早期网络操作系统支持多硬件平台
B.
当前网络操作系统具有互联网功能
C.
硬件抽象层与硬件平台无关
D.
早期网络操作系统不集成浏览器
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【单选题】自流平地面涂层的施工应符合规范要求,以下描述不正确的是( )。
A.
配制好的底涂层材料应均匀涂装在基层上。
B.
固化完全的底涂层应进行打磨和修补,并清除表面浮灰。
C.
当采用溶剂型环氧树脂自流平砂浆地面材料时,应分次施工。
D.
涂层施工可以不连续,漏涂位置下次继续施工即可。
【单选题】听力原文： Penury was what people called a mystery man. We had known him for over seven years, ever since he became a member of our modest club, but be had a way of keeping his private lift to himself in a...
A.
Because nobody knew his address.
B.
Because nobody knew his age.
C.
Because Penury's private life was a secret.
D.
Because Penury was still a bachelor at the age of forty-five.
【简答题】在平面直角坐标系 中，已知 分别是椭圆 的左、右焦点，椭圆 与抛物线 有一个公共的焦点，且过点 . (Ⅰ)求椭圆 的方程; (Ⅱ)设点 是椭圆 在第一象限上的任一点,连接 ,过 点作斜率为 的直线 ,使得 与椭圆 有且只有一个公共点,设直线 的斜率分别为 , ,试证明 为定值,并求出这个定值； （III）在第(Ⅱ)问的条件下，作 ，设 交 于点 ， 证明:当点 在椭圆上移动时，点 在某定直线上.
【单选题】By the end of last year, we _________seven hundred English words.
A.
learned
B.
have learned
C.
had learned
D.
would have learned
【简答题】已知椭圆C的焦点为F 1 （-1，0）、F 2 （1，0），点P（-1， 2 2 ）在椭圆上． （1）求椭圆C的方程； （2）若抛物线E：y 2 =2px（p＞0）与椭圆C相交于点M、N，当△OMN（O是坐标原点）的面积取得最大值时，求P的值． （3）在（2）的条件下，过点F 2 作任意直线l与抛物线E相交于点A、B两点，则直线AF 1 与直线BF 1 的斜率之和是否为定值？若是，求出定值；若不是...
【单选题】(Although) we had been present (at) roughly the same time, Mr. Brown saw the situation quite (diffetrent) from (the way) I saw it.
A.
Although
B.
at
C.
different
D.
the way
【单选题】Della had only one dollar and eighty – seven cents_____ Jim, her Husband, a Christmas present.A．t
A.
27．Della had only one dollar and eighty – seven cents_____ Jim, her Husband, a Christmas present. A．to buy
B.
which to buy
C.
for him to buy
D.
with which to buy
【单选题】(Although) we had been present (at) roughly the same time, Mr. Brown saw the situation quite (different) from (the way) I saw it.
A.
Although
B.
at
C.
different
D.
the way
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