单选题Turn on the pilot light ,“white” up and “ red” down .（）A打开引航灯，上红下白。B打开引航灯，上白下红。C把引航灯从白色变成红色。D把引航灯从红色变成白色。
单选题
Turn on the pilot light ,“white” up and “ red” down .（）
A
打开引航灯，上红下白。
B
打开引航灯，上白下红。
C
把引航灯从白色变成红色。
D
把引航灯从红色变成白色。
参考解析
解析：
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