【单选题】煤气管道可采用()做强度试验和气密性试验。
【判断题】煤气管道可采用空气或氮气做强度试验和气密性试验,并应做生产性模拟试验。()
【单选题】欲使醋酸溶液中的 浓度增大,电离平衡向右移动,且不放出气体,可向醋酸溶液中加入少量固体
【判断题】煤气管道可采用空气或氮气做强度试验和气密性试验。
【单选题】微机型备用电源自动投入装置的输入的开关量包括
【单选题】What is NOT a requirement for the preparation of used,gasoline-propelled cars if they are to be carried as ordinary cargo and not as hazardous cargo ________.
A.
The engine must be run until it dies from lack of fuel
B.
The fuel tank must be inerted with CO2
C.
The ignition key may not be in the ignition
D.
The vehicle must be inspected for fuel leaks
【单选题】Normally, what does pre-interpreting preparation refer to?
B.
short-term preparation
C.
after-interpreting conclusion
【判断题】煤气管道可采用空气或氮气做强度试验和气密性试验。