下列有关护理诊断（或问题)的叙述，哪项错误：A．为评估阶段的最后一步B．为制定护理计划的基础C．是对

A.changing the direction of exhaust gas flow

B.increasing the exhaust gas velocity

C.changing the exhaust gas weight

D.increasing the exhaust gas static pressure

A.performance

B.horsepower output

C.fuel consumption

D.scavenge effect

A、检测EGR（Exhaust Gas Recirculation）流量

B、提高汽车行驶安全性

C、检测汽车行驶的速度

D、改善汽车的性能

What can an exhaust system do if it is efficient？

A．It can prevent the waste gas from escaping.

B．It can let the waste gas and compound escape quickly out of it.

C．It can prevent the engine from producing waste gas.

D．It can store as much waste gas as possible.

Clogged or partially obstructed exhaust ports on a diesel engine can cause____.

A.over-speeding of the engine

B.failure of the engine to shut down

C.no effect of engine mounting bolts

D.high exhaust temperatures

A.bypass exhaust gas at high loads to prevent excessive back pressure

B.bypass a portion of the exhaust gas at peak loads for better efficiency

C.recycle exhaust gas to the turbocharger

D.minimize moisture condensation in the boiler gas passages at low loads

A．optional

B．alternative

C．replacement

D．substitute

exhaust gas turbochargers 意思是废气涡轮增压器。()

use of exhaust gas turbo-charging, in which a turbine wheel driven by exhaust from the engine is rigidly coupled to a centrifugal type air compressor.” According to this sentence, we can know that increases density, drives the compressor directly.

A.a modern diesel engine, a turbine wheel

B.a modem diesel engine, exhaust gases

C.a compressor, an exhaust gas turbocharger

D.a compressor, a turbine wheel

听力原文： Many people tend to disregard the exhaust system of an automobile. They may think that the exhaust system does nothing more than to discharge the waste products of the combustion process. Although this is exactly what the exhaust system does, the way these waste product is discharged out of the engine is essential to the performance of the engine. A gasoline engine involves three processes: combustion, mechanical drive and exhaust. If one of these processes is impeded, the condition of the engine will depreciate. The exhaust system has three major functions, the first of which is to channel out the waste products of combustion out of the engine to allow it to continue to burn fuel unhindered thereby ensuring that the engine runs smoothly. An efficient exhaust system allows the waste gas and compound to escape quickly out of the system. If these waste products do not escape from the engine immediately, they may choke up the engine thus causing it to break down. Another function of the exhaust system is to reduce the noise generated by the engine. The third function of the exhaust system is to clean up the emissions that are harmful to the environment. When the engine burns fuel, it produces gases that pollute the air such as hydrocarbons, carbon monoxide and nitrogen oxides.

What can an exhaust system do if it is efficient？

A．It can prevent the waste gas from escaping.

B．It can let the waste gas and compound escape quickly out of it.

C．It can prevent the engine from producing waste gas.

D．It can store as much waste gas as possible.