下列物质的制备,能由一步反应实现的是( )
A.KNO3→KOH
B.Fe2O3→Fe(OH)3
C.Cu→Cu(NO3)2
D.CaCO3→Ca(OH)2
答案:C
语音知识(共5小题;每小题1分,满分5分)
从A、B、C、D四个选项中,找出其划线部分与所给单词的划线部分读音相同的选项。
1. anything A. many B. magazine C. manage D. match
2. achieved A. practiced B. marked C. operated D. damaged
3. dealt A. deal B. great C. meant D. leader
4. seize A. either B. receive C. eight D. height
5. youth A. thus B. breakthrough C. gather D. although
汽车耐力赛是一种非场地赛,比如法国勒芒24h耐力赛