皮皮学,免费搜题
登录
搜题
【单选题】
下面属于横截面数据的是( )
A.
1990-2011年各年某地区所有乡镇企业的平均工业产值
B.
1980-2011年各年某地区所有乡镇企业各镇的农业产值
C.
2000年我国乡镇服务业总产值
D.
2009年某地区30个乡镇各镇的农业产值
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】听力原文:M: Excuse me! Do you mind if I sit here? W: Not at all. Go ahead. M: Thank you. W: Are you going somewhere, or are you meeting someone? M: I'm on my way to Washington. And you? W: I'm on my way t...
A.
At the airport.
B.
In a restaurant.
C.
On the street.
【单选题】关于计算机内存管理,以下说法正确的是( )
A.
计算机内存由CPU管理。
B.
计算机内存是由计算机操作系统负责管理的。
C.
计算机内存由计算机应用程序自身负责管理和维护。
D.
计算机内存空间的大小与操作系统无关。
【单选题】可以实现定义触发器操作的 SQL 语是
A.
CREATE DOMAIN
B.
CREATE TRIGGER
C.
CREATE ROLE
D.
CREATE ASSERTION
【简答题】Python提供了身份比较运算符( 1 )和( 2 )来测试两个变量是否指向同一个对象。
【单选题】听力原文:M: If you had waited until after the Christmas holidays, you could have bought that dress for much less. W: I know that, but I needed it immediately. I had an important meeting to attend. Q: What...
A.
They are discussing how to celebrate the coming Christmas holidays.
B.
They are discussing whether the woman should buy the new dress.
C.
They are discussing when the woman will attend the meeting.
D.
They are discussing what to do after the Christmas holidays.
【简答题】注: Task 2 为线上作业,需要同学们学习完成景区解说部分后,按下面提示完成任务 Please fill in the blanks with key points to attract your tourists' attention. If you are the tour guide, you would like to introduce the scenic spot as foll...
【简答题】关于计算机内存管理,以下说法正确的是()。 A计算机内存是由计算机操作系统负责管理的 B计算机内存由CPU管理 C计算机内存由计算机应用程序自身负责管理和维护 D计算机内存空间的大小与操作系统无关
【单选题】可以实现定义触发器操作的SQL语是
A.
CREATE ASSERTION
B.
CREATE TRIGGER
C.
CREATE ROLE
D.
CREATE DOMAIN
【单选题】听力原文:W: If you're going to the airport, what about our dinner? M: I'll meet you for dinner after I've been to the airport. What are they going to do together?
A.
To go to the airport.
B.
To go to a meeting.
C.
To have dinner.
【简答题】Python提供了两个对象身份比较运算符 ()和()来测试两个变量是否指向同一个对象。通过内置函数()来测试对象的类型;通过()运算符判断两个变量指向的对象的值是否相同。
相关题目: