【多选题】【消耗次数:1】
There is a variety of programs___________ one can see on every channel.
that
what
which
why
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相关题目
【判断题】 答题说明:句子没有语法错误请选择“正确”,有语法错误请选择“错误”There is a various of programs that one can see on every channel.
①  正确
②  错误
【单选题】 Every one was ____that day.
①  in great spirit
②  in all spirit
③  in high a spirit
④  in high spirit
【判断题】 What do your see in the show?
①  正确
②  错误
【判断题】 答题说明:句子没有语法错误请选择“正确”,有语法错误请选择“错误”Discuss with children in advance which programs they can watch.
①  正确
②  错误
【单选题】 Can anything be done to_________ the negative influence of some television programs?
①  accept
②  assume
③  avoid
④  alarm
【单选题】 Young children often can’t __________ between TV programs and commercials.
①  separate
②  distinguish
③  compare
④  contrast
【单选题】 What does the functional view of language see language?
①  A system of categories based on the communicative needs of the learner
②  A communicative tool to build up and maintain social relations between people
③  A linguistic system made up of various subsystems
④  A a linguistic system and a means for doing things.
【单选题】 What does the structural view of language see language?
①  A system of categories based on the communicative needs of the learner
②  A communicative tool to build up and maintain social relations between people
③  A linguistic system made up of various subsystems
④  A linguistic system and a means for doing things.
【单选题】 What does the interactional view of language see language?
①  A system of categories based on the communicative needs of the learner
②  A communicative tool to build up and maintain social relations between people
③  A linguistic system made up of various subsystems
④  A linguistic system and a means for doing things.
【单选题】 Which one of the following drugs is AChE inhibitor ( )
①  PAM-Cl
②  nicotine
③  neostigmine
④  atropine
⑤  pilocarpine
随机题目
【单选题】 平移刚体上点的运动轨迹,
①  必为直线;
②  必为平面曲线;
③  不可能是空间曲线;
④  可能是空间曲线。
【单选题】 下图所示机构均由两曲柄O1A、O2B和连杆AB组成,且图示瞬时均有O1A//O2B。在下列四图中,当O1A、O2B两曲柄转动时,哪一种情况的杆AB作平移运动
①  <img src=https://huaweicloudobs.ahjxjy.cn/0C8C4A705E3F8ADABC431555BC857508.png style= title=1.png/>
②  <img src=https://huaweicloudobs.ahjxjy.cn/F2EE648E3B2C20EEE4824480FF0C2979.png title=2.png style=white-space: normal;/>
③  <img src=https://huaweicloudobs.ahjxjy.cn/CC78F804F44BF4F30B38F7D5E246A799.png title=3.png style=white-space: normal;/>
④  <img src=https://huaweicloudobs.ahjxjy.cn/F1ED02508D057509D13E1782F9F4572C.png title=4.png style=white-space: normal;/>
【单选题】 图示刚体在一个平面任意力系作用下处于平衡,以下四组平衡方程中哪一组是不独立的<img src=https://huaweicloudobs.ahjxjy.cn/06BB3A04A730753D2E54272845D85329.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>
①  SX = 0, SmO(F) = 0, SmA(F) = 0;
②  SmO(F) = 0,SmA(F) = 0,SmB(F) = 0;
③  SmA(F) = 0,SmC(F) = 0,SY = 0;
④  SX = 0,SmA(F) = 0,SmB(F) = 0。
【单选题】 图示刚体在一个平面任意力系作用下处于平衡,以下四组平衡方程中哪一组是不独立的<img src=https://huaweicloudobs.ahjxjy.cn/658715F53C5600996C2DAE9F34592209.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>
①  SX = 0, Sx = 0, SmA(F) = 0;
②  SmO(F) = 0,SmA(F) = 0,SmB(F) = 0;
③  SmO(F) = 0,SmC(F) = 0,SY = 0;
④  SX = 0,SY = 0,SmO(F) = 0。
【单选题】 已知点沿其轨迹的运动方程为s = b + ct,式中b、c均为常量,则
①  点的轨迹必为直线;
②  点的轨迹必为曲线;
③  点必作匀速运动;
④  点的加速度必为零。
【单选题】 作用在刚体上的力F对空间内一点O的矩是<img src=https://huaweicloudobs.ahjxjy.cn/BB2E168E5E693A6B631DB1741C21B543.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>
①  一个通过O点的固定矢量;
②  一个代数量;
③  一个自由矢量;
④  一个滑动矢量。
【单选题】 图a所示机构中,O1A¤¤O2B,且O1A=O2B=10cm,曲柄O1A以匀角速度w=?2rad/s绕O1轴朝逆时针向转动,O1、O2位于同一水平线上。图b所示CD杆的C端沿水平面向右滑动,其速度大小vC=20cm/s,D端沿铅直墙滑动。图c所示EF杆在倾角为45°的导槽内滑动,契块以匀速u=20cm/s沿水平面向左移动。设AB、CD、EF三均质杆的重量相等,在图示位置时,它们的动量矢量分别用KAB、KCD、KEF表示,则<img src=https://huaweicloudobs.ahjxjy.cn/7F5164D9342515DBB258A6482E6D5FC0.png title=QQ截图20190715141952.png alt=QQ截图20190715141952.png/>
①  KAB=KCD1KEF;
②  KAB=KEF1KCD;
③  KAB1KCD1KEF;
④  KAB=KCD=KEF.
【单选题】 以下四种情况(F1 = F2 = F)的说法,哪一种是正确的
①  力F1与F2对圆轮的作用是等效的;<img src=https://huaweicloudobs.ahjxjy.cn/DAC7A5A07E5B762F6AC1B16EE7DF28CA.png title=1.png alt=1.png style=white-space: normal;/>
②  力F1与F2和M对圆轮的作用是等效的;<img src=https://huaweicloudobs.ahjxjy.cn/D41D4C8C9AA3DF043C51EB343E71E485.png title=2.png alt=2.png style=white-space: normal;/>
③  力F1与F2对圆轮的作用是等效的;<img src=https://huaweicloudobs.ahjxjy.cn/D41D4C8C9AA3DF043C51EB343E71E485.png title=2.png alt=2.png style=white-space: normal;/>
④  力F1与F2对圆轮的作用是等效的;<img src=https://huaweicloudobs.ahjxjy.cn/F89AF243562DBFBF49DE727D80506D7D.png title=4.png alt=4.png/>
【单选题】 刚体作定轴转动时
①  其上各点的轨迹不可能都是圆弧;
②  某瞬时其上任意两点的速度大小与它们到转轴的垂直距离成正比;
③  某瞬时其上任意两点的速度方向都互相平行;
④  某瞬时在与转轴垂直的直线上的各点的加速度方向都互不平行。
【单选题】 如果质点系质心在某轴上的坐标保持不变,则
①  作用在质点系上所有外力的矢量和必恒等于零;
②  开始时各质点的初速度均必须为零;
③  开始时质点系质心的初速度必须为零;
④  作用在质点系上所有外力在该轴上投影的代数和必恒等于零,但开始时质点系质心的初速度并不一定等于零。