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。
He based his holiday plans on the______that his girlfriend was coming with him.
A.hypothesis
B.synthesis
C.thesis
D.crisis
当有机组反应管制员发话时声音偏小,以下原因最不可能的是:()
A、管制员话筒有问题
B、传输线路衰减大
C、发射机功率偏小
D、席位喇叭故障