1.|a|+|b|_____|a+b|（选用一个适当的不等号填在横线上）2.当|x|+2010=|x-2010|时,有理数x的取值范围

( )He _____ a bike.A.needs.B.( )He _____ a bike.A.needs.B.is need a/b=a÷_____=a · _____=_____ · a=_____÷a {a}____{a,b,c} {a,c,b}____{a,b} {a,b,c}_____{a,c,b} 空集_____{a,b,c} They live _____.a.happy b.happily is _____ ok?A everything B anything 英语动词形式填空1.A:Look at the children.What _____ they _____(do)?B:They _____(sing) and _____(dance).A:Listen!What song _____ they _____ (sing)?B:They _____(sing)a Russian song.2A:_____ you _____(go) fishing two hours ago?B:No,I ______.A:__ ( ) 1.There is _____ “u” in _____ word “uniform.”.A) an,a B) an,the C) a,a D) a,the( ) 2._____ sign here stands for _____ mistake.A) A,a B) A,the C) The,a D) The,the( ) 3.We made Joyce _____ monitor ____ her experience.A) a,because B) the,bec (a+b)=_____,(a-b)=_____.（填二次三项式） 若3a²+2|b-1|=0,则a=_____,b=_____ 分解因式 b-2ab+a²b=_____ 当a=-5,b=-3又3/1时,(1)a-b=_____.(2)-a-b=_____.(3)-a-(-b)=_____. 如果a/b=3/4,且a+b=21,那么b-a=_____? 1.已知a、b不是等于0,求a分之/a/+/b/分之b的值?2.若ab互为相反数,则/-a-1-b/=_____,b分之a=_____. 填写英语对话1.A:Is there a bridge over the _____?B:Yes,______ ______.2.A:_____there a forest inthe nature________?B:_____,there isn't. 若√（根号)a-2b+9和/a+b-1/互为相反数,a=_____ ,b=_____ Please draw a line _____ A and B. 计算：(a^2 b)^2÷a _____. Lucy _____ a bag for school.A.need B.needs