编号以7开头的制冷剂，应是下列何项？（）
A、饱和碳氢化合物的衍生物；
B、非饱和碳氢化合物；
C、饱和碳氢化合物；
D、无机化合物
参考答案：D
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
下列哪项不是胸壁疾病引起的胸痛（）
A.胸膜肿瘤
B.肋间神经炎
C.肋骨骨折
D.带状疱疹
E.非化脓性肋软骨炎
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