Which of the following relationships should occur between the temperature developed in a combustion space, and the compression ratio of the engine?（） Higher compression ratios create higher temperature。 Higher temperatures create higher compression ratios。 low temperatures create higher compression ratios。 Higher compression ratios create low temperature。
A vessel loads edible oil in a deep tank through a manhole at the midlength of the tank. In order to fill the tank to maximum capacity，what trim should the vessel have?（） Down by the bow。 Down by the stern。 Down by either the bow or stern。 In level trim。
双段煤气发生炉顶部煤气温度偏高的原因是什么？
为了保证客室换气，每辆车设置（）个自然排风装置。
铝塑复合管在工作温度≤60℃、工作压力≤0.4MPa的条件下，燃气管使用寿命远超过（）年。 10。 50。 60。 30。
在Word的常用工具栏中“显示/隐藏编辑标记”按钮未被按下时，（）。
