理工类教程汇总和更新

The central problem of economics is to satisfy the people's and nation's wants.The problem we are faced w... [查看全文]

Professor Smith lived alone. He was very absent-minded. He used to __1__ the university to give a lecture and f... [查看全文]

Ford Abandons Electric VehiclesThe Ford motor company’s abandonment of electric cars effectively signals the e... [查看全文]

The Gene IndustryMajor companies are already in pursuit of commercial applications of the new biology. They dream... [查看全文]

Irradiating FoodIrradiating fruits, vegetables, pork and chicken to kill insects and bacteria has been approved by... [查看全文]

　　第6部分：完形填空(第51"-'-'65题，每题l分，共15分)　　下面的短文有l5处空白，请根据短文内容为每处空白确定l个最佳选项。　... [查看全文]

　　第6部分：完形填空(第51"——65题，每题l分，共15分)阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个... [查看全文]

　　第6部分：完形填空(第51——65题，每题l分，共15分)　　阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4... [查看全文]

Motoring Technology1.2 million road deaths worldwide occur each year,plus a further 50 million injuries.To reduce c... [查看全文]

Investment and ConsumptionInvestment in the public sector,such as electricity,irrigation,public services and transport... [查看全文]