- 阅读理解。Thirty-six volunteers in South Africa will test the safety of an African-developed vaccine (疫苗) againstHI...
- 根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。Many people think of guys as being ...
- 阅读理解。More than 2 million US teenagers have suffered a serious bout (发作) of depression in the past year,accordi...
- 阅读理解。The African elephant, the largest land animal remaining on earth, is of great importance to African ecosyst...
- 阅读理解。During a state of deep relaxation, several physiological changes take place in the body: the body's oxygenc...
- 阅读理解。An overweight, middle-aged man lies dead on a trolley, with a woman weeping over his body. Thebody's cold h...
- 根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项多余选项。1. _____: less red meat and more fibr...
- 阅读理解。Most of the 20th century has been a development on the Industrial Revolution taken to an extreme: peoplenow...
- 阅读理解。(I)Recently, a solar powered plane took to the sky for the first time. It had passed an important test on t...
- 阅读理解。Three key facts about rising sea levels need to be pointed out to the world's politicians and planners:sea-...
- 阅读理解。Life insurance isn't fun to buy. It forces you to think about your death: a subject many prefer not toconfr...
- 阅读短文,从A-F中选出正确答案。A. Causes of dental fluorosisB. Negative effects of fluorideC. Safe use of fluorideD. ...
- 阅读理解。Most people look forward to retirement as a time when they can finally take up activities that they neverha...
- 阅读理解。I know what you're thinking: Pizza? For breakfast? But the truth is that you can have last night'sleftovers...
- 阅读理解。America is a country on the move. In unheard-of numbers, people of all ages are exercising their way tobett...