文章列表

• 1.【英语时差8,16】咖啡因和记忆力（上）
• Its well known that caffeine has dozens of health benefits. Coffee, for example, is rich in antioxidants: molecules believed to protect against heart ...
• 2.【英语时差8,16】震波决定地震的方向和速度（下）
• And the direction the crystals are pointing makes a difference to the speed seismic waves travel through the rock: a wave traveling parallel to the cr...
• 3.【英语时差8,16】震波决定地震的方向和速度（上）
• The ground may feel solid, but far beneath our feet, extremely hot rock at extremely high pressure is flowing like slow, underground rivers. No one ha...
• 4.【英语时差8,16】乐器有助改善大脑功能（下）
• Other studies have backed this up. A Harvard study found a relationship between early-childhood music lessons and enhanced verbal skills and reasoning...
• 5.【英语时差8,16】乐器有助改善大脑功能（上）
• Rainbows are one of natures most ephemeral beauties, but theres a related phenomenon thats even more ghostly. These are the pale white, rainbow-like a...
• 6.【英语时差8,16】红酒和啤酒（上）
• Some single-celled organisms dont make a shell from calcium material. They extract silicates from the ocean instead, and secrete a shell of solid glas...
• 7.【英语时差8,16】温度和容量B
• This extra jostling pushes the atoms farther apart, causing the whole substance to slightly increase in size. If the substance cools off, its atoms st...
• 8.【英语时差8,16】温度和容量
• They tell us how to dress in the morning and when to stop roasting a turkey. When we catch a cold, they tell us how sick we are. Thermometers are an e...
• 9.【英语时差8,16】手为什么会颤抖？
• Hold your hand out and try to keep it perfectly still. After a moment, it will probably begin to shake. Hold that same hand out just before you give a...
• 10.【英语时差8,16】抗体如何预防艾滋病？B
• Some viruses, including HIV, which is responsible for AIDS, evolve even faster than bacteria. Unlike bacteria (as well as plants and animals), which c...