早上起床喝温水:A Man Walks Into a Bar

A Man Walks Into a Bar A well-dressed man,who looked and talked like an American ,got into the car |a|+|b-a|-|c-a|-|a+b| what makes a man AS*A=MAN a yes-man (a+b)+(a+b)=? A++.A.B+.B是什么意思 a*+b*=(a-b)*+ what is that man ? A.he is John B.yes.it is a man . C.it is John D.He is a worker