The selection of an oil depends （） on the operating conditions, the design of the engine and the type of fuel to be burned.

[单选题]The selection of an oil from the （） depends to a great extent on the operating conditions, the design of the engine and the type of fuel to be burned.A . commercially availableB . commerciallyC . commercial availableD . commerce available

[单选题]The selection of a lubricating oil depends to a great extent on the operating conditions,（）.A . the type of coolantB . the design of the engineC . the type of fuel to be burnedD . B and C

[单选题]The film of oil between the rings and the liner is not only essential for the lubrication but also plays an important part in achieving （）.A . an oil sealB . removing heatC . a gas sealD . cooling the pisto

[单选题]The cleaned heated oil, after passing through the centrifuges, is to be pumped to a （）.A . settling tankB . service tankC . ballast tankD . drain tank

[问答题]Science, in practice, depends far less on the experiments it prepares than

[单选题]The best title for this selection is ______.A． The "Post Paid" ErrorB． The Two Penny BlueC． A Rare StampD． How Mauritius Became Famous

[单选题]________we can succeed or not depends on how well we cooperateA．ThenB．ThusC．WhatD．Whether

[名词解释] 逆向选择Adverse selection

[单选题]In a typical fuel oil system, the oil is stored in tanks in the double bottom from which it is pumped to （） and heated.A . a service tankB . a collecting tankC . a sumpD . a settling tank

[单选题]The quality of the fuel oil and lube oil （）, Im afraid.A . has much to do with the operation of the engine and its lifeB . have much to do with the operation of the engine and its lifeC . has much doing with the operation of the engine and its lifeD