借记卡IC卡电子现金交易不使用密码，电子现金最高余额不得超过（）规定的最高限额。
参考答案：人民银行
Part of the reason Charles Dickens loved his own novel，David Copperfield，was ________ it was rather closely modeled on his own life.(2010·北京)
A．what
B．that
C．why
D．whether
试用两种方法区别澄清的石灰水和氢氧化钠溶液：
方案二：______．
