All diesel engines are classified as（）. four cycle。 compression ignition。 vacuum ignition。 external combustio。
虚拟存储器是用户能作为可编址内存对待的存储空间。
熟练使用灭火器是每个员工应具备的基本职能，普通灭火器的使用步骤一般分为以下哪四步（）。 一提、二拔、三摇、四压。 一提、二摇、三拔、四压。 一摇、二提、三拔、四压。 一拔、二提、三摇、四压。
A VLCC (100，000 DWT+) with a 30，000 Shaft Horsepower Steam Turbine is slow to respond to engine movements and has less stopping power than normal ships because it has a（）. bigger propeller。 smaller power weight ratio。 smaller propeller。 larger power weight ratio。
Concerning the incinerator’s operation, which of the following is not correct?（） Scavenging time should be more 30 seconds before igniting。 The temperature of sludge tank is 80~100℃。 First igniting the incinerator with diesel oil, when the temperature of health is about 600℃, the sludge oil drawn in。 The ash can be dumped into sea when the distance is more than 3 miles from land。
市场营销环境结构的三个层次构成不包括（）
