A:making or receiving
B:to make or receive
C:to have made or received
D:having made or received
— Yes. They are my good friends.
已经过了保质期的食品,只要没发霉,就可以放心食用.(判断对错)
多用表调到欧姆档时,其内部等效电路下列那个是正确的( )