问答题
发布日期:2022-07-15
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如图所示,一带电粒子质量为m、电量为q,垂直于边界进入一个有界的匀强磁场区域,已知它恰好能从上边界飞离磁场区域,且此时速度方向偏离入射方向θ角。已知磁场区域的宽度为d,磁感强度为B,方向垂直于纸面向里,不计粒子所受重力。求: 粒子进入磁场时的速度。
患者,男性,49岁。胃溃疡病史25年,反复发作,每于抑酸对症治疗好转,两个月来,又有疼痛发作,经内科治疗8周不见好转,且逐渐消瘦,最大可能是().
依据《工伤保险条例》的规定,有关工伤社会保险与民事赔偿的表述,不正确的是( )。
某私有网络内有主机需要访问Internet,为了实现此需求,,管理员应该在该网络的边缘路由器上做如下哪些配置?()
对面神经的描述,错误的是()
台词的个性化,就是要求台词必须是人物个性的独特的外在表现,能充分地表现人物的性格、身份和思想感情等。
将电梯装置安装在摩天高楼的中间的一个好处就是光线好。
FusionSphere为了提高资源利用率,采用了哪些措施?()
现公认支气管哮喘的发病机制是()
在抢救危重病人时,哪一条是保证抢救成功的前提?( )
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