读我国部分区域图，回答下列问题。

（1）A河流的名称是__________，B是该河流最大的水利枢纽工程，它位于_____省。

（2）南京市某中学生要乘火车到济南参加第十一届全运会开幕式，请你写出他所经过的铁路干线名称

    ____________________________ 。

（3）武汉附近的江汉平原是我国重要的农业区，请你从地形、气候两方面简要分析当地发展农业的有利

    条件。___________________________________________________________________________________

（4）近年来，A河流含沙量不断增多，有变成第二条“黄河”的趋势，请分析原因并提出解决的措施。

    _________________________________________________________________________________________

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.

（60）是（）

A.train

B.retrain

C.find

D.recruit