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问题 选择题

我国水资源在时间上的分配规律是

A．东南多，西北少

B．东多西少

C．夏秋多，冬春少

D．夏秋少，冬春多

答案

答案：C

题目分析：由于我国水资源地区分布不平衡，为了合理利用水资源，有必要兴建跨流域的调水工程．如引黄济青工程，将黄河水调进青岛市，以解决青岛市供水不足的问题．目前规划上马的南水北调工程，将把长江流域的水调入缺水的华北、西北地区，故选C．

单项选择题

The task at hand now is to (56) the programmers who still use yesterday’s software technology to solve today’s software problems. Object-oriented programming requires a new attitude toward problem (57) . Problem (57) with computer system becomes more natural. Application can (58) be translated into (59) . Although it is commonly believed that it will be easier to train new programmers to use object-oriented techniques than to (60) programmers who have substantial experience in applying conventional programming language constructs.

A．solve

B．solves

C．solved

D．solving
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单项选择题

确保起落架放下锁好防止其脱开的一个额外的方法是（）

A、电磁选择活门断电

B、液牙释压

C、在阻力撑杆和侧撑杆机构上安装安全销

D、没有额外方法
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