下列措施中，（）属于刑事强制措施。
A、拘传
B、劳动教养
C、取保候审
D、留置盘问
参考答案：A, C
设a，b，c是△ABC的三边长，求证：abc≥（a+b-c）（b+c-a）（c+a-b）。
—What's going on between you and Peter?
—We had a fight. I regarded him as my trustworthy friend _____ to my shock, he gave me away. [ ]
A. unless
B. since
C. if
D. until
