下列各组混合液中，可作为缓冲溶液使用的是 。
A: [img=100x25]1803dcfc94d5861.png[/img]HCl与[img=100x25]1803dcfc94d5861.png[/img]NaOH等体积混合
B: [img=100x25]1803dcfc94d5861.png[/img]HAc与[img=100x25]1803dcfc94d5861.png[/img]NaAc等体积混合
C: [img=100x25]1803dcfc94d5861.png[/img][img=72x22]1803dcfcc15b3cf.png[/img]与[img=100x25]1803dcfc94d5861.png[/img]NaOH等体积混合
D: 1 mL [img=100x25]1803dcfc94d5861.png[/img][img=88x22]1803dcfcdbc246e.png[/img]与1 mL [img=100x25]1803dcfc94d5861.png[/img][img=54x22]1803dcfcec45064.png[/img]及1 L的水相混合
A: [img=100x25]1803dcfc94d5861.png[/img]HCl与[img=100x25]1803dcfc94d5861.png[/img]NaOH等体积混合
B: [img=100x25]1803dcfc94d5861.png[/img]HAc与[img=100x25]1803dcfc94d5861.png[/img]NaAc等体积混合
C: [img=100x25]1803dcfc94d5861.png[/img][img=72x22]1803dcfcc15b3cf.png[/img]与[img=100x25]1803dcfc94d5861.png[/img]NaOH等体积混合
D: 1 mL [img=100x25]1803dcfc94d5861.png[/img][img=88x22]1803dcfcdbc246e.png[/img]与1 mL [img=100x25]1803dcfc94d5861.png[/img][img=54x22]1803dcfcec45064.png[/img]及1 L的水相混合
举一反三
- 一个有符号的二进制数[img=100x25]1802fa73d13e5c9.png[/img]。它的反码和补码分别是 A: [img=100x25]1802fa73d96306a.png[/img], [img=100x25]1802fa73e1566c4.png[/img] B: [img=100x25]1802fa73e9cb339.png[/img], [img=100x25]1802fa73e1566c4.png[/img] C: [img=100x25]1802fa73fa9457a.png[/img], [img=100x25]1802fa73e1566c4.png[/img] D: [img=100x25]1802fa73d96306a.png[/img], [img=100x25]1802fa73e9cb339.png[/img]
- 一个有符号的二进制数[img=100x25]1802fa73d1c69fb.png[/img]。它的反码和补码分别是哪一个？ A: [img=100x25]1802fa73d97aea7.png[/img], [img=100x25]1802fa73e167336.png[/img] B: [img=100x25]1802fa73e9a5697.png[/img], [img=100x25]1802fa73e167336.png[/img] C: [img=100x25]1802fa73fa767ae.png[/img], [img=100x25]1802fa73e167336.png[/img] D: [img=100x25]1802fa73d97aea7.png[/img], [img=100x25]1802fa73e9a5697.png[/img]
- 下列各组混合液中，可作为缓冲溶液使用的是 。 A: 0.1 mol/L HCl与0.1 mol/L NaOH等体积混合 B: 0.1 mol/L HAc与0.1 mol/L NaAc等体积混合 C: .0.1 mol/L [img=72x22]1803dd057858658.png[/img]与0.1 mol/L NaOH等体积混合 D: 1 mL 0.1 mol/L[img=88x22]1803dd0580eb6f6.png[/img]与1 mL 0.1 mol/L [img=54x22]1803dd058a168bf.png[/img]及1 L的水相混合
- 设x为整数，[img=100x25]17e4416d10850df.jpg[/img] , 对应的真值是____ A: -1 B: +0 C: -2 D: -15
- 设连续型随机变量X的概率密度函数为f(x),分布函数为F(x),则对任意实数a,( ) A: [img=134x25]18035d8b1ab1984.png[/img] B: [img=100x25]18035d8b22c648d.png[/img] C: [img=114x25]18035d8b2b21f9a.png[/img] D: [img=131x25]18035d8b33a2006.png[/img]