【单选题】That gas pipeline project, _____in July 2002 and__________in 2005, will be China’s longest gas pipeline in history.
B.
started; to be completed
【单选题】'lOprojects in the pipeline' in the last paragraph means 查看材料
A.
10 pipelines to provide gas.
B.
10 companies to lay the pipelines.
C.
10 floating houses to be built on water.
D.
10 building projects planned and started.
【简答题】三极管是一种_____控制器件;而场效应管这是一种_____控制器件。
【多选题】实际输气管温降特点Actual characteristics of gas pipeline temperature drop:
A.
沿程温降速度较输油管快The temperature drop speed along the pipeline is faster
B.
下游管道温度低于环境温度The downstream pipeline temperature is lower than the ambient temperature
C.
沿程温降速度较输油管慢 The temperature drop along the pipeline is slower than that along the pipeline
D.
下游管道温度高于环境温度The downstream pipeline temperature is higher than the ambient temperature