初步审查程序中，审查员应当遵循的程序节约原则的含义是什么？
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风能与其它能源相比其弱点是（）
A. 蕴量巨大
B. 密度低
C. 不稳定
D. 地区差异大
两器同高并列式催化裂化装置，只能采用固定床反应器。
A. 正确
B. 错误
Theoretical perfect combustion in a diesel engine yields by-products of （）.
A. aldehydes and carbon dioxide
B. water vapor and carbon monoxide
C. nitrogen and carbon monoxide
D. water vapor and carbon dioxide
When two vessels are in immediate danger of collision，the stand-on vessel must（）.
A. abandon ship
B. assist in taking whatever action is necessary to avoid collision
C. hold course and speed
D. sound a distress signal
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