【单选题】He reaps a $ 2,000 _____ for winning the design competition.
【简答题】Match the equipment (1-5) to the definitions (A-E)
【多选题】(多选)图为一种改进后的回旋加速器示意图,其中盒缝间的加速电场的场强大小恒定,且被限制在A、C板间,虚线中间不需加电场.带电粒子从P 0 处以速度v 0 沿电场线方向射入加速电场,经加速后再进入D形盒中的匀强磁场做匀速圆周运动.粒子穿出虚线间区域的位置依次记为P 1 、P 2 、P 3 、...,对这种改进后的回旋加速器,下列说法正确的是 ( )
【简答题】Match the equipment to the definitions.
【单选题】对咳嗽多痰者拟行支气管造影,术前用药均需
【单选题】He reaps a $2,000 ______ for winning the design competion.
【多选题】带电粒子在均匀磁场中做圆周运动的周期与哪些因素有关?
【简答题】Match the equipment and their definitions 匹配下列仪器和其定义。
【简答题】Match the following English sentences with the equipment Chinese.
【单选题】对咳嗽多痰者拟行支气管造影,术前用药均需