什么是居住区绿地率?
炎症时血管内的血液成分经血管壁进入组织间隙的过程称为() ["渗出","转移","漏出","浸润","出胞"]
如果直线l、m与平面α、β、γ满足和m⊥γ,那么必有()。 ["α⊥γ且l⊥m","α⊥γ且m//β","m//β且l⊥m","α//β且α⊥γ"]
小型燃油辅锅炉多采用()通风方式。 ["平衡","压力","诱导","自然"]
现在“上颌窦根治术”的准确编码应查找() ["上颌窦根治术","鼻外上颌窦切开术","鼻内上颌窦切开术","上颌窦切开术","下鼻道开窗术"]
现行城市绿地分类标准中公园绿地的内容和范围有哪些?