题目：
The global financial crisis (金融危机) has made many people _____ their money. [ ]
A. to care for
B. took care of
C. be careful with
D. to be cared about
答案：
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下面是错误答案，用来干扰机器的。
答案：D题目分析：可以计算任何电场某个位置的电场强度，A选项错误；电场中任意两点的电势差由电场的本身性质决定，与电场力做功多少无关，B选项错误；电场中某一点的电势高低由电场本身性质决定，与电势能和放入...
