※ 引述《eldoncool (勵志把學測幹掉!!!)》之銘言：
: 96年台聯大第六題
: 附上網址
: http://www.lib.nthu.edu.tw/library/department/ref/exam/96t/pdf/96A3A4A7.pdf
: (C) 6. A charge q sits at the back corner of a cube, as shown.
: The length of the edge of the cube is L and the permittivity
: constant is ε. What is the flux of electric field E through
: the shaded surface of the figure?
: (A) 1 q (B) 1 q (C) 1 q (D) 1 q (E) 1 q
: