【单选题】高压油管无脉动,则可能的原因是________。
A.
某缸高压油泵柱塞卡死在最高位置 B.某缸喷油器针阀卡死在关闭位置
B.
某缸喷油器针阀卡死在关闭位置 D.某缸高压油泵柱塞套筒磨损严重
【单选题】某主机在航行途中,突然出现单缸排烟温度降低,并伴随主机转速下降、高压油管无脉动,则可能的原因是()。
【单选题】防火防爆安全装置可以分为阻火防爆装置与防爆泄压装置两大类,下列关于阻火防爆装置的性能及使用的说法中,正确的是( )。
A.
一些具有复合结构的料封阻火器可阻止爆轰火焰的传播
【单选题】防火防爆安全装置可以分为阻火隔爆装置与防爆泄压装置两大类,下列关于阻火隔爆装置的性能及使用的说法中,正确的是( )。
A.
-些具有复合结构的料封阻火器可阻止爆轰火焰的传播
【单选题】已知一个连通图如下图所示,若从顶点v1出发对该图进行广度优先遍历,下列选项中不正确的遍历结果是:
【单选题】防火防爆安全装置可以分为阻火隔爆装置与防爆泄压装置两大类,下列关于阻火隔爆装置的性能及使用的说法中,正确的是()。
A.
一些具有复合结构的料封阻火器可阻止爆轰火焰的传播
【单选题】已知一个连通图如下图所示,若从顶点v1出发对该图进行深度优先遍历,下列选项中不正确的遍历结果是:
【单选题】Why did Mr. Rochester say '... and then you stab me in the back!' (the 7th para. ) ______.
A.
Because Jane had intended to kill him with a knife
B.
Because Jane had intended to be more critical
C.
Because Jane had regretted having talked to him
D.
Because Jane had said something else to correct herself
【单选题】What is the role of the 7th and 8th paragraphs in the development of the topic?
A.
To illustrate how cooking provides more calories by facilitating absorption and reducing energy consumption.
B.
To make a comparison between the patterns of digestion of human and those of other species.
C.
To show that cooking is not the only way to improve digestion.
D.
To prove that obesity may not be caused by overeating.
【单选题】某主机在航行途中,突然出现单缸排烟温度降低,并伴随主机转速下降、高压油管无脉动,则可能的原因是( )。