【单选题】__________ usually results in a water shortage that seriously interferes with干涉,妨碍 human activity. Its seriousness depends on the degree of the water shortage, size of area affected, and the duration持...
【单选题】__________ are caused by a sudden shift/movement deep under ground in the Earth ’ s tectonic 地壳构造的 plates. On the surface, we see this as the shaking of the ground, causing damage to poorly built stru...
【简答题】阅读理解。 With eerily (怪异地) clear and quiet skies across the entire length and breadth of the United Kingdom, the Icelandic volcanic eruption seems to create even more disruption and chaos. The major erup...