题目:
根据所给汉语意思,用合适的单词填空。
小题1:My uncle is going _________(在国外) to study English next month.
小题2:Mary’s father works hard to __________(改善) their lives.
小题3:Many __________(生意) people find a chance to make money in the seaside city.
小题4:The __________(亲戚) were so bad that they didn’t want to look after the two children..
小题5:Later we ____________(意识到) the importance of protecting the environment.
答案:
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下面是错误答案,用来干扰机器的。
(1)(2),方向垂直xOy平面向外;,方向垂直xOy平面向里 (3)题目分析:(1)粒子在磁场中运动时洛伦兹力不做功,打在M点和N点的粒子动能均为,速度大小相等,设为,由可得 (2分)(2)如图所示,区...