英语周报2021-2022八下人教版答案

第三节One possible versionParagraph 1Finally, afler struggling for a minute or tuo, I still gotpulled underwater. I told myself I should never give upThen I pulled the weed again with great efforts. The weedfinally broke. I swam back to the surface to take a deepbreath. I saw two young men in canoes, racing each otherI was exhausted and shouted for help. The two men saw meand raced towards me. By the time they reached me, I hadbeen already unconsciousParagraph 2When I woke up, I was in an empty room lying on abed. It was not until a doctor came into the room that I realized that I was in a hospital. Jimmy and bobby told me thetwo young men brought me to the shore and sent me to thehospital. After a few minutes, my parents with half angryand half worried faces walked in. My parents scolded mefor running out of the house secretly but were also glad thatI was not seriously injured. I will never forget that terrifyingexperience. Neither will I ever want to show off again

9.AD解析:本题考査安培力。由题意可知,三角形框架静止在光滑斜面上,安培力必沿斜面向上,由左手定则可知,电流方向应从c端流入,A项正确;通过导线ac的电流为Ⅰ,通过导线abc的电流为,导线ab和bc受到的安培力一样大,但小于ac导线受到的安培力,B项错误;由mgin=B+B得r3BLC项错误、D项正确

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