Staying up is bad _____ you , but getting up early is good _____ your health. A. for, for B. to , for C. to, toD. for, to
（8分）根据反应8NH3+3Cl2=6NH4Cl+N2回答下列问题。（1）氧化剂_________，还原剂__________，氧化产物 ，还原产物 。（2）氧化剂与氧
能说明苯分子中的碳碳键不是单双键交替的事实是 A、苯的一元取代物没有同分异构体 B、苯的邻位二元取代物只有一种 C、苯的间位二
Though bought ten years ago,the car is still in good ______. A.situation B.condition C.position D.station
近年来，每当国家进行重大决策时，总是事先发布决策草案、征求意见。全国各地社会公众通过各种途径踊跃发表意见，提出了许多积极的建议，这促
Not until he failed the exam，______ he ______ he wasted too much time playing. A. do; realize B. did; realize C. has; realize D. /; realized
everyone here, I wish you a pleasant journey back to your country. A.By means of B.On behalf of C.In search of D.For fear of
为圆心，且与
轴相切的圆的方程是 ★ ．
