【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
【简答题】番泻叶的原植物属于( )A.豆科 B.水龙骨科 C.蓼科 D.蔷薇科A. 1 B. 1 C. 1 D. 1
【单选题】“人们有什么可感谢我的呢?我上台时他们是贫困的,我离开时他们依然贫困。”出自:()
【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