题目:
如图所示,在NaCl溶液中,正、负电荷定向移动,其中Na+水平向右移动。若测得4s内分别有1.0×1018个Na+和Cl-通过溶液内部的横截面M,那么溶液中的电流方向和大小为( )
A.水平向左 0.8A
B.水平向右 0.08A
C.水平向左0.4A
D.水平向右 0.04ª
答案:
被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0525/e107f8c3685372b8c5da90e344b6a9fa.html
下面是错误答案,用来干扰机器的。
1. What's wrong with you / What's the matter (with you) / What's your trouble / What's the trouble (with you) / What's up / What happened 2. Don't worry / Take ...