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【单选题】
一物体在水平面上作匀变速直线运动,其位移与时间的关系是:x=24t–6 t 2 ,则它的速度为零的时刻t等于( )
A.
1s
B.
2s
C.
6s
D.
24s
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参考答案：
举一反三
【判断题】为了防止用户执行非法I/O，操作系统定义所有 I/O指令为（）。
A.
正确
B.
错误
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【判断题】双领蹄式鼓式制动器两制动蹄都以安装在制动衬板下端的支点为固定支点。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】It can be inferred that the author of the passage expects that the experience of the student mentioned as having studied Wife in the Right would ______.
A.
lead the student to disregard information found in the Bibliotheca Britannica
B.
teach the student to question the accuracy of certain kinds of information sources when studying neglected authors
C.
teach the student to avoid the use of reference sources in studying neglected authors
D.
help the student to understand the importance of first editions in establishing the authorship of plays
查看完整题目与答案
【单选题】为了防止用户执行非法I/O，操作系统定义所有 I/O指令为（）。
A.
原子操作
B.
中断
C.
私有指令
D.
系统调用
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【多选题】歌唱音色调整训练中的支点分为（ ）、（ ）、前中下支点、（ ）、下支点五个类别。
A.
前中上支点
B.
头腔和腹部
C.
后中上支点
D.
后中下支点
查看完整题目与答案
【单选题】It can be inferred that the author of the passage expects that the experience of the student mentioned as having studied Wife in the Right, would have one of the following effects.
A.
It would lead the student to disregard information found in the Bibliotheca Britannica.
B.
It would teach the student to question the accuracy of certain kinds of information sources when studying neglected authors.
C.
It would teach the student to avoid the use of reference sources in studying neglected authors.
D.
It would enhance the student's appreciation of the works of authors not included in the canon.
查看完整题目与答案
【单选题】为了防止用户执行非法I/O，操作系统定义所有 I/O指令为（）。
A.
原子操作
B.
中断
C.
特权指令
D.
系统调用
查看完整题目与答案
【简答题】用手钳剪铁丝时，手的握力P 1 =50N，握力点距钳的支点为L 1 为130mm，铁丝受力点距钳的支点L 2 为15mm，求在铁丝上产生多大的力P 2 ？
查看完整题目与答案
【多选题】歌唱音色调整训练中的支点分为()、()、前中下支点、()、下支点五个类别
A.
前中上支点
B.
后中下支点
C.
后中上支点
D.
头腔和腹腔
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【单选题】以下关于力臂、阻力臂叙述正确的是
A.
支点到力点的垂直距离为力臂
B.
支点到力点的垂直距离为阻力臂
C.
阻力点到力点的垂直距离为阻力臂
D.
支点到阻力点的垂直距离为力臂
E.
力点到阻力点的垂直距离为阻力臂
查看完整题目与答案
相关题目：
【判断题】为了防止用户执行非法I/O，操作系统定义所有 I/O指令为（）。
A.
正确
B.
错误
查看完整题目与答案
【判断题】双领蹄式鼓式制动器两制动蹄都以安装在制动衬板下端的支点为固定支点。()
A.
正确
B.
错误
查看完整题目与答案
【单选题】It can be inferred that the author of the passage expects that the experience of the student mentioned as having studied Wife in the Right would ______.
A.
lead the student to disregard information found in the Bibliotheca Britannica
B.
teach the student to question the accuracy of certain kinds of information sources when studying neglected authors
C.
teach the student to avoid the use of reference sources in studying neglected authors
D.
help the student to understand the importance of first editions in establishing the authorship of plays
查看完整题目与答案
【单选题】为了防止用户执行非法I/O，操作系统定义所有 I/O指令为（）。
A.
原子操作
B.
中断
C.
私有指令
D.
系统调用
查看完整题目与答案
【多选题】歌唱音色调整训练中的支点分为（ ）、（ ）、前中下支点、（ ）、下支点五个类别。
A.
前中上支点
B.
头腔和腹部
C.
后中上支点
D.
后中下支点
查看完整题目与答案
【单选题】It can be inferred that the author of the passage expects that the experience of the student mentioned as having studied Wife in the Right, would have one of the following effects.
A.
It would lead the student to disregard information found in the Bibliotheca Britannica.
B.
It would teach the student to question the accuracy of certain kinds of information sources when studying neglected authors.
C.
It would teach the student to avoid the use of reference sources in studying neglected authors.
D.
It would enhance the student's appreciation of the works of authors not included in the canon.
查看完整题目与答案
【单选题】为了防止用户执行非法I/O，操作系统定义所有 I/O指令为（）。
A.
原子操作
B.
中断
C.
特权指令
D.
系统调用
查看完整题目与答案
【简答题】用手钳剪铁丝时，手的握力P 1 =50N，握力点距钳的支点为L 1 为130mm，铁丝受力点距钳的支点L 2 为15mm，求在铁丝上产生多大的力P 2 ？
查看完整题目与答案
【多选题】歌唱音色调整训练中的支点分为()、()、前中下支点、()、下支点五个类别
A.
前中上支点
B.
后中下支点
C.
后中上支点
D.
头腔和腹腔
查看完整题目与答案
【单选题】以下关于力臂、阻力臂叙述正确的是
A.
支点到力点的垂直距离为力臂
B.
支点到力点的垂直距离为阻力臂
C.
阻力点到力点的垂直距离为阻力臂
D.
支点到阻力点的垂直距离为力臂
E.
力点到阻力点的垂直距离为阻力臂
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