社会保障主要有以下几个特征______。
A．法律强制性
B．营利性
C．对象社会性
D．福利性
E．机会公平性
参考答案：A,C,D,E
用适当的词完成这篇短文，每个空格只能填写一个形式正确、意义相符的单词。
It was 小题1: 1st . I went to Hainan with my parents. We went there by train. We went 小题2: in the sea（海）. Look at the third picture, we had a rest there. It was小题3: , and we were very happy. Then we went to小题4: some seafood for lunch. It was not 小题5: , so we didn’t like it! This is our trip to Hainan.
慢性化脓性骨髓炎的骨膜反应X线表现多为
A．与骨皮质表面平行的线状
B．花边状
C．葱皮状
D．放射状
E．袖口状
