行政制裁可以分为()
A、行政处分
B、行政强制
C、行政处罚
D、劳动教养
E、行政拘留
参考答案:A, C, D
With the help of high technology, more and more substances _________ in the past years.
A.discovered
B.have discovered
C.had been discovered
D.have been discovered
“民生体”主要担负着()。