试述眶腔的交通关系?
参考答案:
通过视神经管和眶上裂与颅中窝相交通;通过眶下裂与颞下窝和翼腭窝相交通;通过眶下管、眶下孔与面部相交通;通过鼻泪管与鼻腔的下鼻道相交通。
---Emma has to stay at home to look after her little sister, ?
---Yes, because her mother has gone to the supermarket.
A.does she
B.is she
C.doesn’t she
D.hasn’t she
市政燃气设施改动方案应当符合燃气发展规划,明确安全施工要求,有()的措施。
A.安全防护和应急预案
B.安全检查和保障供气
C.安全防护和保障正常用气
D.施工监理和临时供气