【判断题】在Access2010中,不允许同一表中有相同的字段名。
【单选题】mso-hansi-font-family:Tahoma">对于任意滴定反应,滴定剂 T 与待测物质 A 有如下关系: t T + a A → p P + q Q Tahoma;mso-hansi-font-family:Tahoma">当达到化学计量点时, mso-ascii-font-family:宋体;mso-hansi-font-family:宋体">由上面的反应式可知, t mol...
A.
C T × V T : m A /M A = t : a
B.
m A ÷ M A : C T × V T = t : a
C.
C T × V T × 1000 : m A /M A = a : t
D.
C T × V T ÷ 1000 : m A /M A = t : a
【单选题】mso-ascii-font-family:Tahoma;mso-hansi-font-family:Tahoma">题图中,加工 φ Tahoma">孔,如果选择 A mso-ascii-font-family:Tahoma;mso-hansi-font-family:Tahoma">面而不选 M Tahoma;mso-hansi-font-family:Tahoma">或 N 面作为定位基准,...
A.
mso-ascii-font-family:Tahoma;mso-hansi-font-family:Tahoma;mso-bidi-font-family: "Times New Roman";mso-bidi-theme-font:minor-bidi;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">基准重合 微软雅黑;mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font:minor-bidi; mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">
B.
mso-ascii-font-family:Tahoma;mso-hansi-font-family:Tahoma;mso-bidi-font-family: "Times New Roman";mso-bidi-theme-font:minor-bidi;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">基准统一 mso-fareast-font-family:微软雅黑;mso-bidi-font-family:"Times New Roman";mso-bidi-theme-font: minor-bidi;mso-ansi-language:EN-US;mso-fareast-language:ZH-CN;mso-bidi-language: AR-SA">
C.
mso-ascii-font-family:Tahoma;mso-hansi-font-family:Tahoma;mso-bidi-font-family: "Times New Roman";mso-bidi-theme-font:minor-bidi;mso-ansi-language:EN-US; mso-fareast-language:ZH-CN;mso-bidi-language:AR-SA">互为基准
D.
mso-hansi-font-family:Tahoma">基准不重合误差最小条件
【单选题】对于任意滴定反应,滴定剂 T 与待测物质 A 有如下关系: t T + a A → p P + q Q Tahoma;mso-hansi-font-family:Tahoma">当达到化学计量点时, mso-ascii-font-family:宋体;mso-hansi-font-family:宋体">由上面的反应式可知, t mol T 恰与 a mol A 完全反应即: n T Tahom...
A.
n A : n T = C T × V T : m A /M A
B.
n T : n A =m A ÷ M A : C T × V T
C.
n A : n T = C T × V T × 1000 : m A /M A
D.
n T : n A = C T × V T ÷ 1000 : m A /M A
【单选题】下列有关氨的叙述中,正确的是 1氨气极易溶于水,可以用来做喷泉实验 2可用湿润的蓝色石蕊试纸检验氨气 3可用向上排空气法收集氨气 4氨易液化,工业上可用氨作制冷剂 5实验室制得氨气用碱石灰干燥
【单选题】mso-hansi-font-family:Tahoma">对于任意滴定反应,滴定剂 T 与待测物质 A 有如下关系: t T + a A → p P + q Q Tahoma;mso-hansi-font-family:Tahoma">当达到化学计量点时, mso-ascii-font-family:宋体;mso-hansi-font-family:宋体">由上面的反应式可知, t mol...
A.
n A : n T = C T × V T : m A /M A = t : a
B.
n T : n A =m A ÷ M A : C T × V T = t : a
C.
n A : n T = C T × V T × 1000 : m A /M A = a : t
D.
n T : n A = C T × V T ÷ 1000 : m A /M A = t : a
【单选题】检验氨气可以用 ( ) A .湿润的红色石蕊试纸 B .干燥的红色石蕊试纸 C .干燥的蓝色石蕊试纸 D .湿润的蓝色石蕊试纸