【单选题】国际电信联盟认为,媒介有以下五种:感觉媒介、表述媒介、表现媒介、存储媒介与传输媒介,其中()媒介包括声音、文字、图形、图像等以及物质的质地、形状、温度等。
【单选题】If an electric motor fails to start, you should FIRST check the ______.
C.
fuse or circuit breaker
【简答题】沟通媒介有四类:印刷媒介、视听媒介、______、______。
【单选题】If the electric motor driving an air compressor fails to start, the cause may be a _____.
B.
tripped circuit breaker
【单选题】项目监理机构在施工准备阶段监理工作的主要内容包括( )
【单选题】If an electric motor driven air compressor fails to start, it may be due to a _____.
A.
leaking discharge valve
C.
tripped overload relay
D.
broken discharge un-loader
【单选题】下列不属于液压泵打不出油或油量少的原因是( )
【单选题】If an electric motor fails to start, you should first check the_____.
C.
fuse or circuit breaker