停药后，血药浓度降至阈浓度以下残留的生物效应是
A．过敏反应B．后遗效应C．停药反应D．耐受性E．毒性反应
参考答案：B
After two hours of hard fighting,the northern army won the ________.
A．enemy
B．force
C．war
D．battle
I spent a _____ vacation, so I'm _____ now.[ ]
A. relaxed; relaxing
B. relaxing; relaxing
C. relaxing; relaxed
D. relaxed; relaxed
