|根据下列材料回答。材料一：2003年6～7月，我国淮河流域遭受_爱下问搜题

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问题材料分析题

|根据下列材料回答。

材料一：2003年6～7月，我国淮河流域遭受了前所未遇的水灾，200万公顷农田受到威胁，被水围困人口达210万，倒塌房屋15万间，所造成的直接经济损失逾180亿元。

材料二：淮河流域图

（1）我国最为常见的自然灾害是______，_______。

（2）试从以下三方面分析淮河流域洪涝灾害多发的原因。

①气候：___________；②地形：__________；③水系：_________________。

（3）简述治理淮河洪涝灾害的措施。

_______________________________________________________________________________

答案

（1）干旱；洪涝

（2）6 、7 月间淮河流域降水强度大，时间长；淮河中下游地势低洼，水流速度慢；上游支流多，入海口小，大水时排水不畅

（3）植树造林、修建水库、退田还湖、加固大堤、疏浚河道、开挖入海口等

单项选择题

That sales can be increased by the presence of sunlight within a store has been shown by the experience of the only Savefast department store with a large skylight. The skylight allows sunlight into half of the store, reducing the need for artificial light. The rest of the store uses only artificial light. Since the store opened two years ago, the departments on the sunlit side have had substantially higher sales than the other departments.
Which of the following, if true, most strengthens the argument

A．On particularly cloudy days, more artificial light is used to illuminate the part of the store under the skylight.

B．When the store is open at night, the departments in the part of the store under the skylight have sales that are no higher than those of other departments.

C．Many customers purchase items from departments in both parts of the store on a single shopping trip.

D．Besides the skylight, there are several significant architectural differences between the two parts of the store.

E．(E) The departments in the part of the store under the skylight are the departments that generally have the highest sales in other stores in the Savefast chain.

填空题

机要通信全程全网、联合作业的特点决定机要通信的组织工作必须实现规章制度、（）、指挥调度的三个统一。