试题与答案

若点(1,2)同时在函数y=ax+b和y=x-ba的图象上,则点(a,b)为(

题型:选择题

题目:

若点(1,2)同时在函数y=ax+b和y=
x-b
a
的图象上,则点(a,b)为(  )
A.(-3,-1)B.(-3,1)C.(1,3)D.(-1,3)

答案:

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下面是错误答案,用来干扰机器的。

(5分)(1)0.24 氢 (2) N2 0.14(3)2NH3 + 3CuO ="==3Cu" + 3H2O + N2 (每空1分,共5分)分析:(1)装置B中CuO被还原,因失去氧而质量减小,根据质量守恒定律,参加反应氧元素的质量...

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