下列对珍爱生命的理解，最全面的是（    ）

月球卫星．

To ________ somebody or something means to protect somebody or something from attack or danger.

组装直流电动机后，接通电源，若出现下表左边的现象，请分析原因，然后将右边的故障现象填在括号内（填写选项）：

（2015•广东佛山）阅读下面短文，用所给单词的恰当形式填空，使短文通顺、合理。每词限用一次，有一个多余的选项。

                                    information   find   if   million   serve   try   whether   power

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