读图，回答问题：

图一 寻找工作的长龙

图二  田纳西水利工程

图三 改建街道

（1）图一反映了美国什么社会问题？                                                                                                                                                                 （2）图二和图三反映了美国针对图一的社会问题采取了什么措施？这一措施的直接目的    是什么？                                                                                                                                                                                                                                                                                                                                  （3）通过罗斯福新政，美国失业状况得到缓解。从中你可以得到什么历史认识？                                                                                                                                                                

存金通业务遵循（）的原则。

A、账实对接

B、买卖分离

C、实盘交易

D、风险统控