向AgNO3溶液中加入一定质量的Al和Fe的混合粉末,充分反应后过滤,得到滤渣和浅绿色滤液.以下关于该滤渣和滤液的说法中正确的是 ①向滤渣中加入稀盐酸,一定有气泡产生 ②向滤渣中加入稀盐酸,可能没有气泡产生 ③滤渣中一定含有Ag,可能有Fe ④向滤液中加入稀盐酸,一定有沉淀产生 ⑤滤液中一定含有Fe(NO3)2,一定不含AgNO3,可能含有Al(NO3)3.
Where are you going,Bob?
To go hiking.Eric ________ for me at the school gate!( )
A.was waitingB.waits
C.waitedD.is waiting
Would you like to attend the farewell party next week,Mr.Huang?
Sure,I'd love to.I have no reason to _______ your invitation.( )
A.turn downB.turn offC.turn upD.turn on
Your father never shops online.Why's that?
He says they're much ________ but the products are not really good.( )
A.nicerB.cheapC.niceD.cheaper
My parents are crazy about Running Man.How about your parents?
_______ my dad _______ my mom likes it.But they prefer Ode to Joy(欢乐颂)( )
A.Not only;but alsoB.Both;and
C.Either;orD.Neither;nor
Junior high school days will be over _______ a week.How are you feeling?
I'm trying to keep my cool because we've been together ________ three years.( )
A.in;inB.for;inC.in;forD.for;for