双绞线传输介质是把两根导线绞在一起，这样可以减少信号传输时的衰减。

单项选择题In the film Schindler's List, we can see a train is carrying some women to the concentration camp. The white-and-black color, plus the flashing and changing of shadow and light can create an atmosphere of all except _________.A. horrorB. desperationC. uncertaintyD. distrust

不定项选择‌ 托盘采用1000mm×12mm规格或规格尺寸的整数倍。‏