A reciprocating air compressor is running roughly and vibrating excessively, indicating that the （）.
When the air charge contacts with the cylinders and pistons and mixes with the residual gases, it will（）
In order to distribute the side pressures over a wide area of the cylinder walls and liners, which of the listed types of pistons are used in modem low pressure air compressors?（）
The device used for low-pressure control and high-pressure cutout on a compressor is called （）.
In terms of pressure and temperature in the refrigerant in the compressor, what happens to the primary?（）
The major difference between the discharge and suction valves installed in most low pressure, reciprocating air compressors is that（）
If an air compressor is used to supply compressed air to outlets throughout the engine room and on deck of a vessel, the system is known as the （）.
If a large difference exists between the compressor discharge pressure and the pressure corresponding to the existing condensing temperature in a refrigeration system, you should（）.
Condensate must be drained from the intercooler and after-coolers of an air compressor because （）.
（）is the function of loading goods in the pallet and wrapping it.
You have the binary number 10011101. Convert it to its decimal and hexadecimal equivalents.（）
The hot expanding gas rotates the blades of the exhaust turbine, thus （） a large of its power, （） drives the compressor.
The loss of （） from an air compressor could lead to an overheated air discharge and possibly an explosion in the pipelines leading to the air reservoir.
The example of Cannon advertisement that displays consumers its specification, features and so on illustrates the function of advertising that it provides product and brand information.
“the extensive study of what is good, accurate inquiry about it, careful reflection on it, the clear discrimination of it, and the earnest practice of it.”
The Canterbury Tales contains ____ and 24 tales, and it leaves unfinished.
With information it receives from the cerebral cortex and the basal ganglia about the position of the limbs, the cerebellum helps the limbs moves smoothly and accurately. It does so by constantly adjusting muscle tone and posture.
Geely had the money and was willing to invest it in Volvo and was sure that once entered the Chinese market it would soon earn money.
It seems as if the sun_____round the earth since it rises in the east and sets in the west.
In a direct expansion type multi-box refrigeration system, the compressor is set up to cycle on and off by the_______.
听力原文：M: It's nice and quiet here, away from the dust and noise of the city. And our apartments are new and well furnished.
We know much about the universe. It means the earth, the sun, the moon and the stars, and the space __21__ them.
What is the writer’s conclusion？ If the Ancient Greeks struggled with it, and all the life coaches, counsellors and motivational speakers in the modern world are unable to erase it from our existence
(2013十堰单选题) How did the elephant express its feeling when it saw the young woman? A young man from a village called Nawalapitiya married a young woman from Maiyuwa, a small village. They lived with the man's big family—his parents, his brothers, their wives and husbands and children. The family kept an elephant, in which the woman soon took a great interest. Every day she fed it with fruit and sugar. Three months later, having quarreled with her husband, the woman went back to her parents' home. Soon the elephant refused to eat and work. It appeared to be ill and heartbroken. One morning after several weeks the animal disappeared from the house. It went to the woman's home. On seeing her, the elephant waved its trunk and touched her with it. The young woman was so moved by the act of the animal .So she went back to her husband's home. A It waved its trunk and smiled.B It touched her with its trunk.C It touched her and cried.D It waved its trunk and ran around her.
