南回归线是一条重要的纬线，关于它的叙述，正确的是（ ）。 A．热带与北温带的分界

高温下CuO和CO中发生如下反应： CuO(s)+CO(g) Cu(s)+CO₂(g)。已知该反应在不同温度下的平衡常数如下：

请回答下列问题：

(1) 该反应的平衡常数表达式K＝________，ΔH________0(填“>”“<”或“＝”)；

(2) 在一个容积为10 L的密闭容器中，1 000 ℃时加入Cu、CuO、CO、CO₂各1.0 mol，反应经过10 min后达到平衡。求该时间范围内反应的平均反应速率v(CO₂)＝________、CO的平衡转化率＝________；

(3) 欲提高(2)中CO的平衡转化率，可采取的措施是__ __。

A．减少Cu的量　　

B．增加CuO的量

C．移出部分CO₂

D．提高反应温度

E．减小容器的容积

F．加入合适的催化剂

为了满足街道和建筑物都有较好的采光条件，图中设计正确的是[ ]

A、

B、

C、

D、5440,5441,5442,5444,5446,5447,5448,5449,5450,5451,5452,5455,5456,5459,5460,5461,5462,5463,5464,5465,5466,5467,5469,5470,5471,5472,5480,5481,5483,5484,5487,5488,5489,5491,5496,5498,5499,5500,5501,5503,5505,5507,5509,5511,5512,5513,5514,5516,5520,5521,5522,5523,5524,5525,5526,5527,5528,5529,5530,5531,5533,5536,5539,5540,5542,5543,5544,5545,5546,5547,5548,5549,5550,5551,5552,5554,5558,5559,5560,5561,5562,5563,5564,5565,5567,5568,5570,5571,5572,5574,5578,5579,5581,5582,5588,5590,5592,5594,5595,5597,5599,5600,5601,5604,5605,5606,5607,5608,5609,5611,5612,5613,5614,5615,5618,5619,5620,5621,5622,5624,5625,5627,5628,5629,5631,5633,5634,5638,5643,5657,5671,5672,5674,5675,56795440,5441,5442,5444,5446,5447,5448,5449,5450,5451,5452,5455,5456,5459,5460,5461,5462,5463,5464,5465,5466,5467,5469,5470,5471,5472,5480,5481,5483,5484,5487,5488,5489,5491,5496,5498,5499,5500,5501,5503,5505,5507,5509,5511,5512,5513,5514,5516,5520,5521,5522,5523,5524,5525,5526,5527,5528,5529,5530,5531,5533,5536,5539,5540,5542,5543,5544,5545,5546,5547,5548,5549,5550,5551,5552,5554,5558,5559,5560,5561,5562,5563,5564,5565,5567,5568,5570,5571,5572,5574,5578,5579,5581,5582,5588,5590,5592,5594,5595,5597,5599,5600,5601,5604,5605,5606,5607,5608,5609,5611,5612,5613,5614,5615,5618,5619,5620,5621,5622,5624,5625,5627,5628,5629,5631,5633,5634,5638,5643,5657,5671,5672,5674,5675,5679

多项式-x³+xy+y³-3是______次______项式，二次项系数为______，常数项为______，三次项系数的和为______．

纸张调湿处理的目的是什么？有哪几种方式？各有什么特点？

合伙协议的生效要件是什么？效力如何？如何修改、补充？