理工類(lèi)教程匯總和更新

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題，每題l分，共15分)　　下面的短文有l(wèi)5處空白，請(qǐng)根據(jù)短文內(nèi)容為每處空白確定l個(gè)最佳選項(xiàng)?！?.. [查看全文]

　　第6部分：完形填空(第51"——65題，每題l分，共15分)閱讀下面的短文，文中有15處空白，每處空白給出了4個(gè)選項(xiàng)，請(qǐng)根據(jù)短文的內(nèi)容從4個(gè)... [查看全文]

　　第6部分：完形填空(第51——65題，每題l分，共15分)　　閱讀下面的短文，文中有15處空白，每處空白給出了4個(gè)選項(xiàng)，請(qǐng)根據(jù)短文的內(nèi)容從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]