这道题选B,为什么?3.There are two governments in this country.But neither of them is regarded as the _______ one by the other.A.panel B.legal C.purple D.republic

电离能 :K+> Ar> Cl-?为什么? 一． 单项选择（25分）( )1.I think there will be ____people and _____ pollution.A .fewer,many B.less,fewer C.more,less D .less,fewer( ) 2.For example,there are already robots ____ in factories.A worked B working C to work D work( ) 3.There ar Read and try to write例 ar p(ar)k st(ar) c(ar) h(ar)d() fl() cr() b()e m() 为什么氮气是n2,氩气是ar? 为什么二拼音是er.却读成ar? 为什么Ne比Ar更活泼? 1.What,by losing one one eye,has nothing left but a nose?2.What is it that is found in the very center of America and Australia?3.The total age of boys is now seventeen.What will it be in six years’ time?4.There are two bookshelves A and B.There ar Is there any meat in the tomato soup?-No,there isn't any./there's no meat.any为什么不能省略there be 句型的回答不应该是No,there is/are吗?为什么要这样回答?什么情况下得加any?-Are there any hats in your room?A.Yes,there ar 相对原子质量和Ar的问题.Ar不是相对原子质量的符号吗,那为什么氩的符号也是Ar? 忘了:-A(a-r)=B(b-r)等于A(r-a)=B(b-r)吗?为什么?如题：请看官注意“ 负号”：-A(a-r)=B(b-r) 等于 A(r-a)=B(b-r) 可以这样化吗?为什么?因为 Aa+Bb=(A+B)r所以 Aa+Bb=Ar+Br即 0=Ar+Br-(Aa+Bb)0=Ar+Br-Aa-Bb0=A(r-a)+B(r-b)-B(r-b) A.doll(ar) B.m(ar)ket C.c(ar).D.f(ar)m 4个单词中哪个( )的发音与其他不同,写出音标更完美 为什么亚铁离子的电子排布式不是[Ar] 3d54s1或[Ar] 3d44s2? 英语补全单词（ ）1.p___ch A.ae B.ai C.ea D.ee（ ）2.monet_____ A.ar B.er C.or D.ur（ ）3.s__face A.ar B.er C.or D.ur（ ）4.sin__e A.gl B.sl C.tl D.bl（ ）5.creat____ A.ar B.er C.or D.ur( )2.monst_______ (29)There is enough food for birds,isn't____?A.it B there C that D this (38)---Tom,these books ar(29)There is enough food for birds,isn't____?A.it B there C that D this (38)---Tom,these books are very important for you.----Yes,mum.I'll___them____.A.p how many bridges are there?a.there are two.b.there is only one.为什么? how many bridges are there?a.there are two.b.there is only one.为什么? 往水中分别加入下列例子,其中会使水的电离平衡发生移动的是 A;NA+ B:K+ c:Ar- D:F- 为什么 空气中的下列气体,性质最稳定的是?A氧气 B氮气 C CO2 D AR 答案是D氩气,为什么?