温度计在安装时压力大于或等于6.4MPa,温度大于450OC或测量腐蚀性介质时,宜采用() ["A、螺纹连接","B、法兰连接","C、熔焊连接","D、绕性连接"]
高速缓存由()构成。 ["SRAM","DRAM","EPROM","硬磁盘"]
货油舱舱口围板高度一般不少于()。 ["A.300mm","B.600mm","C.750mm"]
常用的K型(镍铬-镍硅)热电偶在0℃、100℃、200℃时分别对应:() ["A、0Ω;4.09Ω;8.173Ω","B、0mV;4.095mV;8.173mV","C、0Ω;19.40Ω;38.78Ω","D、0mV;19.40mV;38.78mV"]
下列()不是半导体存储器芯片的性能指标。 ["存储容量","存储结构","集成度","最大存储时间"]
发电车有哪些测量及指示功能?