【单选题】We all know that compared with the healthy food, the _________food, is not nutritious, like fried food, pickled food and canned food, etc.
【单选题】Compared with the generation of our grandparents, who grew up in an age when people were lack of almost every kind of materials, we should be content with the ____ supply.
【简答题】已知两种钴的配合物具有相同的化学式 Co(NH 3 ) 5 BrSO 4 ,它们之间的区别在于:在第一种配合物的溶液中加 BaCl 2 时,产生 BaSO 4 沉淀,但加 AgNO 3 时,不产生沉淀;第二种配合物的溶液则与之相反。根据以下资料,回答问题: ( A ) [Co(NH 3 ) 5 Br]SO 4 ;( B ) [Co(NH 3 ) 5 SO 4 ]Br ;( C ) +2 ;( D ...
【单选题】Which is not that important compared with the other things when we pack our backpack before a typhoon comes?
【简答题】配合物命名:写在练习本上,拍照上传。 (1) H 2 [SiF 6 ] ; (2) [Fe(CO) 5 ] ; (3) K 3 [Fe(CN) 6 ] ; (4) [Co(NH 3 ) 5 H 2 O]Cl 3 ; 。
【单选题】Generally speaking, compared with the domestic trade, there are more difficulties and risks when we do international trade.
【单选题】写竞聘演讲稿需要做到( ),要说明哪年哪月哪日在什么岗位做了什么岗位,什么业绩,领导如何表扬,
【单选题】在配合物 [Co(ONO)(NH 3 ) 5 ] 2+ ,配位原子为