根据Found:A pencil box.和Please call Mary at 498-0752.故选B 【2】句意:约翰的电话号码是---。根据My name is John.和My phone number is 498-5241故选A 【3】句意:这个手表是---。根据I lost my watch in the library.I must find it.It's brown and white.故选C 【4】句意:詹妮在图书...
Found:A pencil box. It's blue and white.In it,I find two pencils and a green ruler. Is it yours?Please call Mary at 498-0752. Found:Two English books. Are these your books? My name is John. My phone number is 498-5241. Lost:A watch. I'm Jenny. I lost my watch in the li...
I need such(这样的) a man to look after(照顾) my father. He’s 78 years old, but he’s healthy. If you want to get the job, you need to work for four hours every day from Monday to Friday, 1:00 P.M. to 5:00 P.M. And on weekends, you need to work for only two ...
如图.粗糙水平面与半径R=1.5m的光滑圆弧轨道相切于B点.质量m=1kg的物体在大小为10N.方向与水平水平面成37°角的拉力F作用下从A点由静止开始沿水平面运动.到达B点时立刻撤去F.物体沿光滑圆弧向上冲并越过C点.然后返回经过B处的速度vB=15m/s.已知sAB=15m.g=10m/s2.sin37°=0.6
由方程<img src="https://static.zxtiku.com/wangke/imgs/topic/59e24ff71010ca5694f4688a635b3f2f.jpg"/>所确定隐函数的导数<img src="https://static.zxtiku.com/wangke/imgs/topic/bf437440a81d476cb1ca63d877beb4f6.jpg"/>( )<br/> A、<img src="https://static.z
(6分)如图所示的电路中,电源电压为18V且保持不变,电阻R1的阻值为10Ω,滑动变阻器R2上标有“50Ω 1A”字样.闭合开关S后,通过R1的电流为0.6A.求: (1)电阻 R1的两端的电压U1; (2)此时电流通过R2消耗的电功率P2; (3)计算在移动滑片的过程中电压表的最小示数. ...
Your local grocery store is a psychological minefield E) , where even the bananas are ripe with mystery. 1. Southpaws have an invisible advantage You've probably seen that stores keep go-to items - produce,meats,dairy - on the outer edge. But did you no
C. 22°03′S,100°58′E D. 22°03′N,100°58′E 【2】小亮位于求助站的什么方向 A.东北方 B. 西南方 C. 西北方 D. 东南方试题答案 在线课程 【答案】 【1】D 【2】B 【解析】 试题分析: 【1】在经纬网上,经线的度数叫做经度,若相邻两条经线的经度向东增大,就是东经,用符号E表示,若相邻...
如图所示.电源电压不变.R1.R2.R3为三个定值电阻.已知电阻R1的阻值为20Ω.开关S闭合后.电压表V1的示数为12V.电压表V2的示数为10V.电流表的A示数为0.4A,若断开开关S.将电压表V1换成电流表A1.电压表V2换成电流表A2.再将开关S闭合后.测得A1的示数为I1.A2的示数为I2.则下列说法
在光滑水平面上静止放置一足够长的木板B.B的质量为mB=2kg.B右端离竖直墙S=5m.在B的左端静止一小物体A.其质量为mA=0.99kg.一质量为mC=0.01kg的子弹以v=600m/s的速度击中A并留存A中.且相互作用时间极短.如图所示.A与B间的动摩擦因数为μ=0.4.在运动过程中只是B与墙壁碰撞.碰撞