A.SELECT Sno，Sname，Sdept FROM Student WHERE Sdept =（SELECT Sdept FROM Student WHERE Sname =’刘晨’）；
B.SELECT S1.Sno，S1.Sname ，S1.Sdept FROM Student S1，Student S2WHERE S1.Sdept =S2.Sdept AND S2.Sname =’刘晨’；
C.SELECT Sno，Sname，Sdept FROM Student WHERE Sdept IN （SELECT Sdept FROM Student WHERE Sname =’刘晨’）；
D.SELECT Sno，Sname，Sdept FROM Student WHERE Sdept LIKE （SELECT Sdept FROM Student WHERE Sname =’刘晨’）；