【单选题】在常见的固体、液体、气体中,导热能力最弱的是( )。
【判断题】薄板焊接结构要多考虑焊接变形和焊接应力。
【单选题】在构成D/A转换器的电路中,不属于D/A转换器组成部分的是()。
【单选题】Tom plays tennis very well and . [ ]
【简答题】A.It does not concern John. B.John does not care about his car. C.John will help him fix the car. D.He wants John to fix the car.
【判断题】显示卡上的接口主要有供电接口、桥接接口、PCI-E接口、输入接口。