题型:问答题 简答题 读一读,排顺序。( ) I like winter best. We play in the snow. ( ) Which season do you. like best?( ) Halloween and Thanksgiving!( ) Winter is good, but fall is my favourite season. 查看答案
题型:问答题 简答题 下图是质谱仪工作原理的示意图.带电粒子a、b经电压U加速(在A点初速度为零)后,进入磁感应强度为B的匀强磁场做匀速圆周运动,最后分别打在感光板S上的x1、x2处.图中半圆形的虚线分别表示带电粒子a、b所通过的路径,则( )A.a的质量一定大于b的质量B.a的电荷量一定大于b的电荷量C.a运动的时间大于b运动的时间D.a的比荷(qa/ma)大于b的比荷(qb/mb) 查看答案
题型:问答题 简答题 It's important to write these goals down, rather ________ think about them.[ ]A.specially B.graduallyC.originally D.merely 查看答案