【简答题】阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。 In much of Asia,especially the so-called“ricebowl” cultures of China,Japan,Korea,41 Vietnam,food is usually eaten with chopsticks. Chopsticks are usually two long,...
【单选题】虚拟变量模型 中, 为居民的年可支配收入, 为虚拟解释变量, =1 代表城镇居民, =0 代表非城镇居民。当 满足古典假设时,则 表示( )
【简答题】阅读下面短文,根据所读内容在表格中的空白处填入适当的单词。(注意:每个空格只填一个单词) Women smoking cigars were not common for a very long time.Cigar smoking was for very wealthy men and a very few wealthy women. Cigar smoking was seen as a ...
【单选题】虚拟变量模型 中, 为居民的年可支配收入, 为虚拟解释变量, = 1 代表城镇居民, =0 代表非城镇居民。当 满足古典假设时,则 表示( )
【单选题】设定模型 Y i = a + b D i + u i , 其中 Y i 为居民的年可支配收入, D i 为虚拟解释变量, D i =1 代表城镇居民; D i =0 代表非城镇居民。该模型的经济意义是( )
B.
当 u i 满足古典假设时,有城镇居民的年平均收入: E(Yi|Di=0)= a
C.
当 u i 满足古典假设时,有非城镇居民的年平均收入 : E(Yi|Di=0)= a+ b
D.
截距项 a 给出了非城镇居民的年平均可支配收入水平,而另一系数 b 则表明城镇居民年平均可支配水平不同于非城镇居民年平均可支配收入的部分
【简答题】编写一个 shell 脚本,以下面的格式显示 HOME,PATH,SHLVL 和 LOGNAME 变量 的值。 HOME = PATH = SHLVL = LOGNAME =
【简答题】阅读理解。 阅读下面短文,根据所读内容在表格中的空白处填入适当单词。注意:每个空格只填一个单词。 Nowadays more and more people are concerned about their health, but how to keep healthy? Different people may give different answers to this question. ...
【简答题】阅读材料,回答问题: 阅读下面材料,在空白处填入适当的内容(1个单词)或括号内单词的正确形式。 In much of Asia,especially the so-called“rice bowl” cultures of China,Japan,Korea, 41 Vietnam,food is usually eaten with chopsticks. Chopsticks are usua...
【简答题】阅读下面的短文,在标有序号的空白处填入一个适当的词,或填入括号中动词的适当形式。 However, there was one band that 74_______ (start) in a different way. It was 75_______(call) the Monkees and began as a TV show. The 76___________ were to pla...