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问题 单项选择题

城市污水处理厂，沉淀池采用污泥斗排泥时，每个泥斗均应设单独的闸阀和排泥管。泥斗的斗壁与水平面的倾角，方斗宜为（）。

A.350

B.450

C.600

D.900

答案

参考答案：C

1、下面这幅画的作者和画名分别是什么？

                                                                                                                                                             

2、该作者最擅长画什么？他的这类画有什么特点？ 

                                                                                                                                                             

                                                                                                                                                             

3、当时，人称他的“三绝”是什么？

                                                                                                                                                             

4、他的另外一幅代表画是什么？

                                                                                                                                                            

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