有关右冠状动脉供血的描述，哪一项是错误的?A.右心房  B.右心室  C.室间隔后1

下图是天津市五大片新建住宅区。读图，回答下列问题。

（1）从经济因素考虑，这五大片安居工程选址的主要原因有：①_____________________;②_____________________。

（2）这些居民区大多房屋建筑面积大，设备齐全，环境条件优越。从社会因素考虑，这五大片安居工程选址的原因有________________________________。

（3）与这些安居工程配套建设的还应有___________________区的布局与建设。

（4）你认为在这五片居民区当中地价更高一些的是_____________________，试说明理由：___________________。

阅读理解。

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世界贸易组织提倡的无国界经济发展，是全球物流的推动力。

3～6kV电力系统的工频过电压，其允许水平一般不超过( )。

经营预测的内容？