【单选题】As American farmers approach the 21 st century, they still face some of the same problems they have been confronted with during the 20 th century. One of the most important is __________.
【简答题】A The eruption in May 1980 of Mount St. Helens, Washington State, astounded the world with its violence. A gigantic explosion tore much of the volcano's summit to fragments; the energy released was eq...
【简答题】翻译下面段落 Living in the 21st century, an age when reality TV is prevalent among us, it’s impossible not to be familiar with the various talent shows bursting onto our screens! There is The X Factor, The ...