网络表用于记录和描述电路中的各个元件的数据以及各个元件之间的连接关系。（ ）

单项选择题3. Which is the hidden weapon that Lincoln employed to fight with Confederate Army and finally achieved the reunion of the nation? A、Will-powered soldiers B、 military tactics C、railroad D、 personal charm

单项选择题无偿献血的血液用途是