题目

根据短文理解，选择正确答案。 Terrible disasters in the last 50 or 100 years have become increasingly common. Over the last 30 years, the number of weather-related disasters has increased quickly, and the disasters have also affected more people and caused more economic loss. However, much of this could be avoided through disaster risk reduction(DRR降低灾难风险). A meeting, held in Sendai, Japan last month, opened one day after Cyclone Pam（飓风Pam）hit Vanuatu, which struck the islands with winds of up to 340km/h and destroyed the island nation. The speech by the Presid读澳大利亚和美国示意图，回答问题。（1）据图分析两国地势起伏变化的共同之处是________。（2）两国农业生产区域性特征显著，农业机械化程度都很高，其有利实现机械化生产的主要自然因素是________。（3）牛仔裤耐磨耐脏，选料为粗棉布。图中数码①②代表的农业带中，能够为生产牛仔裤提供原料的农业带是________（填数码）。（4）硅谷是乙国高新技术产业集中分布地区，其主要的有利条件是____。（5）甲国矿产资源的分布特点是______，这样的分布特点，有利于______。（6）试说明甲国动植物古老性的原因____________。