The purpose of an after－cooler is to_____.A.reduce the turbocharger operating temperatureB

When used in conjunction with a turbocharger, the main function of an after－cooler is to _

A business invitation letter serves the purpose of inviting a （) to a party, an event

What is the purpose of this conversation？A．The man wants to obtain an international driver

What is the purpose of the first paragraph？A．To create an intriguing atmosphere.B．To draw

What is the main purpose of the talk？A．To show what happens after an economy has experienc

What is the conversation mainly about？A．The purpose of laughter.B．The cause of laughter an