皮皮学，免费搜题
登录
搜题
【判断题】
面粉新鲜度是鉴别面粉品质的最基本标准A.
正确
B.
错误
拍照语音搜题，微信中搜索"皮皮学"使用
参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Why does the author mention the history of tape recorders in the first paragraph?
A.
To inform. readers of new inventions.
B.
To lead into his following suggestion.
C.
To give an example of his suggestion.
D.
To show the importance of tape recorders
【单选题】今欲用H3PO4与Na2HPO4来配制pH = 7.2的缓冲溶液,则H3PO4与Na2HPO4物质的量之比n(H3PO4)∶n(Na2HPO4)应当是( ) (H3PO4的pKa1~pKa3分别是2.12,7.20,12.36)
A.
3:1
B.
1:1
C.
1:2
D.
1:3
【单选题】下列文件中,数据量最小的是( )
A.
一个含100万字的TXT文本文件
B.
一个分辨率为1024×768,颜色量化位数24位的BMP位图文件
C.
一段10分钟的MP3音频文件
D.
一段10分钟的MPEG视频文件
【单选题】今欲用H3PO4与Na2HPO4来配制pH = 7.2的缓冲溶液,则H3PO4与Na2HPO4物质的量之比n(H3PO4)∶n(Na2HPO4)应当是(H3PO4的pKa1~pKa3分别是2.12,7.20,12.36)
A.
1:1
B.
1:2
C.
1:3
D.
1：4
【单选题】下列文件中,数据量最小的是 ()
A.
一个分辨率为1024×768，颜色量化位数24位的BMP位图文件
B.
一个含100万字的TXT文本文件
C.
一段10分钟的MPEG视频文件
D.
一段10分钟的MP3音频文件
【简答题】在 Excel2010的单元格中输入18位身份证号前,需设置单元格格式为
( )。A. 数字型 B. 日期型 C. 文本型 D. 常规型
【单选题】Why does the author mention the 'mother' and 'father' in the first paragraph?
A.
to present the background of statistics in a humorous and understandable way
B.
to point out that parents can teach their children statistics
C.
to explain that there are different kinds of variables
D.
to introduce inferential statistics
【单选题】Why does the author state in the first paragraph that observations are taken 'just once every twelve hours'?
A.
To indicate that the observations are timely.
B.
To show why the observations are of limited value.
C.
To compare data from balloons and computers.
D.
To give an example of international cooperation.
相关题目：