41+4÷1
=45÷1
=45
答:实际上就是现价是原价的45.
故选:B.
师生关系中最基本的一种关系是( )
A.工作关系
B.心理关系
C.道德关系
D.个人关系
A vessel with a small GM will().
A.be more subject to synchronous rolling
B.have a short rolling period
C.procide an uncomfordtable ride for personnel
D.have a smaller amplitude of roll in heavy weather