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【单选题】
已知草酸为二元弱酸:H 2 C 2 O 4 HC 2 O 4 - + H + Ka 1 ; HC 2 O 4 - C 2 O 4 2 - +H + Ka 2 ,T°C常温下,浓度的草酸溶液中逐滴加入一定量浓度的KOH溶液,所得溶液中H 2 C 2 O 4 、HC 2 O 4 - 、C 2 O 4 2 - 三种,微粒的物质的量分数(δ)与溶液pH的关系如图所示,则下列说法中 不正确 的是
A.
T℃时,lgK a2 =-4.2
B.
pH=1.2溶液中:c(K + )+c(H + )=c(OH ﹣ )+c(H 2 C 2 O 4 )
C.
pH=2.7溶液中:
D.
向pH=1.2的溶液中再加KOH溶液,将pH增大至4.2的过程中水的电离度一直增大
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举一反三
【单选题】电位不相等的两个等位面
A.
可以相交
B.
可以相切
C.
不能相交或相切
D.
仅有一点相交
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【单选题】对蛋白质沉淀、变性和凝固的关系的叙述,哪项是正确的?
A.
变性蛋白质一定会凝固
B.
沉淀的蛋白质一定凝固
C.
沉淀的蛋白质必然变性
D.
凝固的蛋白质一定变性
查看完整题目与答案
【判断题】实际上敏感膜内外两个表面性质不完全相同,这样当待测试液与内参比溶液的离子活度相等时,膜电位不等于0,此时的电位差叫作不对称电位。
A.
正确
B.
错误
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【单选题】In communication, it is essential not only to employ speech, but also ______.
A.
to speak directly to the other person
B.
to employ a variety of bodily movements
C.
to be certain that the other person is listening
D.
to pay great attention to the other person's behavior
查看完整题目与答案
【单选题】创建员工管理数据库Employ,主要数据文件为Employ,物理文件名为D:\Employ\Employ.mdf,初始大小为3MB,最大容量为20GB,增长速度为10%;事务日志逻辑名称为Employ_log,物理文件名为E:\Employ\Employ_log.ldf,初始大小为1MB,最大容量为600MB,增长速度10%。
A.
CREATE DATABASE Employ ON (NAME=Employ.mdf, FILENAME='D:\ Employ\Employ.mdf', SIZE=3, MAXSIZE=20GB, FILEGROWTH=10%) LOG ON (NAME=Employ_log.ldf, FILENAME='E:\ Employ\Employlog.ldf', SIZE=1, MAXSIZE=600, FILEGROWTH=10%)
B.
CREATE DATABASE Employ ON (NAME=Employ, FILENAME='D:\ Employ\Employ', SIZE=3, MAXSIZE=20GB, FILEGROWTH=10%) LOG ON                                  -- 创建事务日志文件 (NAME=Employ_log, FILENAME='E:\ Employ\Employ_log', SIZE=1, MAXSIZE=600, FILEGROWTH=10%)
C.
CREATE DATABASE Employ ON (NAME=Employ, FILENAME='D:\ Employ\Employ.ldf', SIZE=3, MAXSIZE=20GB, FILEGROWTH=10%) LOG ON                                  -- 创建事务日志文件 (NAME=Employ_log, FILENAME='E:\ Employ\Employ_log.mdf', SIZE=1, MAXSIZE=600, FILEGROWTH=10%)
D.
CREATE DATABASE Employ ON (NAME=Employ, FILENAME='D:\Employ \Employ.mdf', SIZE=3, MAXSIZE=20GB, FILEGROWTH=10%) LOG ON                                  -- 创建事务日志文件 (NAME=Employ_log, FILENAME='E:\ Employ\Employ_log.ldf', SIZE=1, MAXSIZE=600, FILEGROWTH=10%)
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【多选题】下列属于个人理财业务相关主体的有( )。
A.
个人客户
B.
商业银行
C.
非银行金融机构
D.
政府机关
E.
监管机构
查看完整题目与答案
【简答题】会计档案保管期满，应由（ ）共同派员监督销毁。
查看完整题目与答案
【简答题】写作题。 Write about a person you admire. ————————————————————————————————————————————————————————————————————————————————————————————
查看完整题目与答案
【单选题】A writer may employ different techniques to describe a thing or a person, EXCEPT______.
A.
telling what he has seen
B.
showing through the use of active verbs and precise modifiers
C.
focusing on the rich, vivid and lively details
D.
the elaborate use of sensory language
查看完整题目与答案
【单选题】In communication, it is essential not only to employ speech, but also ______.
A.
to speak directly to the other person
B.
to employ a variety of bodily movements
C.
to be certain that the other person is listening
D.
to pay great attention to the other person's behaviour
查看完整题目与答案
相关题目：
【单选题】电位不相等的两个等位面
A.
可以相交
B.
可以相切
C.
不能相交或相切
D.
仅有一点相交
查看完整题目与答案
【单选题】对蛋白质沉淀、变性和凝固的关系的叙述,哪项是正确的?
A.
变性蛋白质一定会凝固
B.
沉淀的蛋白质一定凝固
C.
沉淀的蛋白质必然变性
D.
凝固的蛋白质一定变性
查看完整题目与答案
【判断题】实际上敏感膜内外两个表面性质不完全相同,这样当待测试液与内参比溶液的离子活度相等时,膜电位不等于0,此时的电位差叫作不对称电位。
A.
正确
B.
错误
查看完整题目与答案
【单选题】In communication, it is essential not only to employ speech, but also ______.
A.
to speak directly to the other person
B.
to employ a variety of bodily movements
C.
to be certain that the other person is listening
D.
to pay great attention to the other person's behavior
查看完整题目与答案
【单选题】创建员工管理数据库Employ,主要数据文件为Employ,物理文件名为D:\Employ\Employ.mdf,初始大小为3MB,最大容量为20GB,增长速度为10%;事务日志逻辑名称为Employ_log,物理文件名为E:\Employ\Employ_log.ldf,初始大小为1MB,最大容量为600MB,增长速度10%。
A.
CREATE DATABASE Employ ON (NAME=Employ.mdf, FILENAME='D:\ Employ\Employ.mdf', SIZE=3, MAXSIZE=20GB, FILEGROWTH=10%) LOG ON (NAME=Employ_log.ldf, FILENAME='E:\ Employ\Employlog.ldf', SIZE=1, MAXSIZE=600, FILEGROWTH=10%)
B.
CREATE DATABASE Employ ON (NAME=Employ, FILENAME='D:\ Employ\Employ', SIZE=3, MAXSIZE=20GB, FILEGROWTH=10%) LOG ON                                  -- 创建事务日志文件 (NAME=Employ_log, FILENAME='E:\ Employ\Employ_log', SIZE=1, MAXSIZE=600, FILEGROWTH=10%)
C.
CREATE DATABASE Employ ON (NAME=Employ, FILENAME='D:\ Employ\Employ.ldf', SIZE=3, MAXSIZE=20GB, FILEGROWTH=10%) LOG ON                                  -- 创建事务日志文件 (NAME=Employ_log, FILENAME='E:\ Employ\Employ_log.mdf', SIZE=1, MAXSIZE=600, FILEGROWTH=10%)
D.
CREATE DATABASE Employ ON (NAME=Employ, FILENAME='D:\Employ \Employ.mdf', SIZE=3, MAXSIZE=20GB, FILEGROWTH=10%) LOG ON                                  -- 创建事务日志文件 (NAME=Employ_log, FILENAME='E:\ Employ\Employ_log.ldf', SIZE=1, MAXSIZE=600, FILEGROWTH=10%)
查看完整题目与答案
【多选题】下列属于个人理财业务相关主体的有( )。
A.
个人客户
B.
商业银行
C.
非银行金融机构
D.
政府机关
E.
监管机构
查看完整题目与答案
【简答题】会计档案保管期满，应由（ ）共同派员监督销毁。
查看完整题目与答案
【简答题】写作题。 Write about a person you admire. ————————————————————————————————————————————————————————————————————————————————————————————
查看完整题目与答案
【单选题】A writer may employ different techniques to describe a thing or a person, EXCEPT______.
A.
telling what he has seen
B.
showing through the use of active verbs and precise modifiers
C.
focusing on the rich, vivid and lively details
D.
the elaborate use of sensory language
查看完整题目与答案
【单选题】In communication, it is essential not only to employ speech, but also ______.
A.
to speak directly to the other person
B.
to employ a variety of bodily movements
C.
to be certain that the other person is listening
D.
to pay great attention to the other person's behaviour
查看完整题目与答案