阅读短文，根据短文选择正确的答案。

    Uncle Wangworks in 1 bookstore in the middle of the city. The shop is not far from his home. It is about three kilometers (公里) away. So Uncle Wang seldom (很少) 2 to work by bus. He usually goes there 3 bike, sometimes on foot. It takes him ten minutes to get there by bike and forty minutes on foot. Today his bike is broken.  He wants to walk there. Now he is having breakfast. At ten to eight, he leaves home and walks to work.  It's twenty 4 earlier than usual.  His work starts at half past eight in the morning and 5 at a quarter (一刻钟) to five in the afternoon.

一艘航行于太平洋的船，从12月30日12时（区时）起，经过5分钟，越过了180º经线，这时其所在的地点的区时不可能的是(　　)

如图，AB为圆O的直径，C、D两点均在圆上，其中OD与AC交于E点，且OD⊥AC．若OE=4，ED=2，则BC长度为（　　）

【旅游地理】

德国鲁尔区在转型过程中，利用原有工厂建筑、生产设备等开发出了具有独特观光、体闲等功能的工业遗产旅游产品，吸引了世界各国的众多游客前来游览，并从中了解现代工业化历史和工业文明。图1为埃森一焦化厂内高55米的双轴提升井架，被称为“鲁尔区之塔”。图2为杜伊斯堡景观公园中的工业遗迹。

试分析鲁尔区发展工业旅游的有利条件。