如图所示,光线从玻璃斜射入空气中,若SO为入射光线,则折射光线可能是( )
A.OM
B.ON
C.OP
D.OQ
答案:A
The boss has given everyone a special holiday, so we _____ go to work tomorrow. [ ]
A. can't
B. mustn't
C. needn't
D. shouldn't
记忆电话号码是一种配对联想学习过程。