选择~
1.I don't really want to make this appointment,but I suppose I ____ A must B must have to C will D have to do 2.The old woman lay on the bed,____ A awake B awakely C is awake D be awake 3.Congratulations,Lily!You have ____ in English. A made an progress B made such progress C made progresses D made a progress 4.What would have happened ____ as far as the river bank? A Bob had walked farther B if Bob should walk farther C had Bob walked farther D if Bob walked farther 5.____sat down for a rest ____ the door bell rang. A Hardly Ihad;when B Hardly Ihad;than C Hardly had I;than D Hardly had I;when
答：描写冬天的成语 白雪茫茫 银装素裹 万里雪飘 千里冰封 白雪皑皑 冰天雪地 寒气袭人 寒冬腊月 冰清玉洁 滴水成冰 瑞雪纷飞 冰封雪盖 漫天飞雪 雪虐风饕 朔风...详情>>
问：已知a,b属于R,求证:a^2+b^2>=a*b+a+b-1
答：答案如下： 由（a-1)^2+(b-1)^2>=0 得到a^2+b^2+2>=2(a+b)--------(1) 又由(a+1)^2+(b+1)^2>=2(a+...详情>>
问：“ prefer to...rather than ”是一个词组吗？
答：prefer to do rather than do sth 与其作后者的事情的不如做前者去事情。 可以等同于= prefer to do instead o...详情>>
