有以下程序： include ＜stdio.h＞ void f（）; } 执行后的输出结果【 】。
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The baby was left in charge of my aunt.The baby was left in charge of my aunt.
Name the body parts: Look at the picture, and write the body part that is at each number. （） 37. ____ 38. ____ 39. ____
能够将接收的光信号功率变换为电信号电流,实现光-电转换的光器件是
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