庇护
参考答案：国际法上庇护的一般意义是指国家对丁因政治原因被迫诉或遭迫害而请求避难的外国人，准其入境、居留和给予保护。
Mass deaths of birds were not unheard of, but they normally happened unnoticed at sea or in rural areas away from towns. Many birds are weak and die in winter _______ food is scarce.
A．which
B．what
C．when
D．how
云梯消防车底盘部分是由车架、驾驶室、前轴、后轴、离合器、变速箱等组成完整的底盘整车结构。
