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【简答题】
在某温度下,向容器中加入一定量的 NO 和 O 2 ,发生下列反应 (1) 反应达到平, NO 、 O 2 和 NO 2 的浓度分别为 1.5 、 2.2 、 3.6 mol · L -1 ;达到平 ,设 O 2 消耗的浓度为 x ,则 NO 消耗的浓度为 ( 1 )、 NO 2 生成 的浓度为 ( 2 )。 (2) 由各组分平的浓度信息可列出各组分的初始浓度依次为( 3 )、 ( 4 )、 ( 5 )(用含 x 的代数式表示)。 (3) 因为反应刚开始时没有产物,因此 NO 的 ( 6 )浓度=0,由此: x =( 7 ) mol · L -1 , c (NO) 初始 = ( 8 ) mol · L -1 ; NO 的转化率式为: P = NO 的 ( 9 ) 浓度 / NO 初始的浓度 × 100% , 数值为( 10 ) (用百分数表示,保留一位小数)。
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She doesn't know what to bring to the parry.
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A.
正确
B.
错误
【简答题】编写程序,实现分段函数计算,如下表所示。
x y
x<0 0 0<=x<5 x 5<=x<10 3x-5 10<=x<20 0.5x-2 20<=x 0
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