题目

如图所示，在与匀强磁场垂直的平面内放置一个折成锐角的导线框，。在它上面搁置另一根与垂直的直导线，紧贴、，并以平行于的速度从顶角开始向右匀速滑动。设线框和直导线单位长度的电阻为，磁感强度为，则回路中的感应电流的方向为_________（填“顺时针”或“逆时针”），感应电流的大小为________________________。 An old man who lived in a small back street of my hometown had to tolerate the nuisance of boys playing football and making a lot of noise outside his house at night. One evening when the boys were particularly_16__，he went out to talk to them. He explained that he had just retired and was__17_when he could see or hear boys playing his__18__game，football. He would__19__give them ￥25 each week to play in the street at night. The boys got__20__，for they could hardly believe__21__they were being paid to do something they__22__. The first two weeks had passed，the boys came to the old man’s house，and went away__23__with their 25 yuan. The third week when they came back，__24__，the old man said he hadn’t had much money__25__himself and sent them away with only 15 yuan. The fourth week，the man said he had not yet received his__26__from the government and gave them only 10 yuan. The boys were very disappointed，but there was__27__much that they could do about it. At the__28__of the fifth week，the boys came back and__29__at the old man’s door，waiting for their__30__.Slowly，the door opened and the old man appeared.He__31__that he could not afford to pay them 25 yuan__32__he had promised，but said he would give them five yuan each week without__33__. This was really too much for the boys. “You expect us to play seven days a week for merely five yuan！” they yelled.“__34__！” They__35__away and never played on the street again. A. hot           B．noisy             C．troublesome          D．naughty A. happiest      B．excited        C．encouraged            D．bored A. interesting   B．amusing        C．acceptable             D．favorite A. more ever          B．therefore        C．willingly              D．forever A. shouted      B．cried              C．thrilled                D．smiled A. how          B．when             C．that                    D．what A. expected    B．enjoyed      C．admired              D．respected A. happily      B．thankfully      C．gratefully              D．tearfully A. but          B．in addition      C．however              D．besides A .earned       B．saved           C．remained             D．left A. paycheck    B．insurance       C．food tickets        D．salary A. not          B．no                 C．so                        D．very A. final         B．end                C．start                     D．beginning A. kicked       B．hit              C．beat                D．knocked A. rewards     B．awards           C．checks              D．wages A. expressed   B．apologized      C．stated                  D．expected A .as            B．like                C．when                 D．though A. fail          B．hesitation       C．joke                   D．problem A. No way    B．No possible    C．No problem           D．No play A. walked      B．stormed      C．broke                  D．backed