问题
选择题
- did you go on your holiday?
-I went to Beijing. [ ]
A. How
B. What
C. Where
答案
答案：C
搜题请搜索小程序“爱下问搜题”
- did you go on your holiday?
-I went to Beijing. [ ]
A. How
B. What
C. Where
答案：C
，其他条件不变，这时两极板间电势差为U2，板间场强为E2，下列说法正确的是（）。