社会保障管理体制
参考答案:社会保障管理体制是指国家为实施社会保障事业而规定的从中央到地方的各种社会保障管理机构、管理原则和运行机制的总和。
Global Health officials have been closely monitoring a new virus related to SARS that is believed ______ at least one person in Saudi Arabia.
A.to kill
B.to be killing
C.to have killed
D.kill
弹簧托架是轴箱与车架之间的中间装置。