题目

根据短文内容，从方框中选择适当的词或短语，并用其正确形式填空，使短文完整、正确。（每个词只能用一次，有两个多余选项） late    send  mean      telephone   sure    write call    I     such as    go off      clock    early Some people remember things by 1_______ notes to themselves．Then they leave the notes in obvious places，2_______ on the table or on the floor．I don’t think I like to write notes to 3_______．Most of the time I lose them or forget to look at them until it's too 4_______．I prefer t在如图所示的电路中，当滑动变阻器的滑动头向下滑动时，A、B两灯亮度的变化情况为      (    )                          A．A灯和B灯都变亮       B．A灯变亮，B灯变暗C．电源的输出功率减小    D．电源的工作效率降低