民事执行的原则主要有( )。
A.依法执行原则
B.执行标的有限原则
C.保护申请人合法权益的原则
D.强制与说服教育相结合的原则
参考答案:A,C
All of us didn't notice Tom come into the classroom because the light happened to ________ at that time.
A.give in
B.put up
C.go out
D.switch off
锅炉按应用的燃料不同,可分为燃煤锅炉、燃油锅炉燃气锅炉。( )