云南省昭通市2025届高三上学期1月毕业生诊断性检测物理答案
昭通市2025届高中毕业生诊断性检测物理评分细则选择题:共10小题,共46分。在每小题给出的四个选项中,第1~7题只有一项符合题目要求,每小题4分;第8~10题有多项符合题目要求,全部选对的给6分,选对但不全的给3分,有选错的给0分。【解析】1.根据核反应前后质量数和电荷数守恒,可判断式中的X是α粒子,故A正确,B错误。组成铀原子核的核子较多,则铀的结合能较大,故C错误。半衰期不会因外部条件改变,故D错误。2.若不漏磁,根据发射线圈与接收线圈的电压比与匝数比相等,可计算出接收线圈的电压为10V,根据题意,接收线圈的电压小于10V,故A正确,B、C、D错误。3.飞船在A点由轨道Ⅰ进入轨道Ⅱ需点火...
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