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【单选题】
设个人消费函数 ,消费支出y不仅与收入x有关,而且与消费者的年龄构成有关,年龄构成可以分为老,中,个层次,假定边际消费倾向不变,则该消费函数引入虚拟变量的个数为( )A.
1个
B.
2个
C.
3个
D.
4个
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举一反三
【单选题】下列关于子对象的描述中，错误的是（ ）。
A.
子对象不可以是自身类的对象
B.
子对象是另一个类的对象
C.
子对象的初始化要包含在构造函数中
D.
一个类中只能有一个子对象
【简答题】What did Wilbur eat when he went to Fern’s home for the first time?
【单选题】The reason ____he had to look after his mother at hospital was not the one ____he gave to us.
A.
why, why
B.
that, which
C.
why, that
D.
that, why
【简答题】What did Mr. Zuckerman ask Lurvy to feed Wilbur?
【单选题】下列关于子对象的描述中,()是错误的
A.
子对象是类的一种数据成员，它是另一个类的对象
B.
子对象不可以是自身类的对象
C.
对子对象的初始化要包含在该类的构造函数中
D.
一个类中只能含有一个子对象作为成员。
【单选题】He gave us a very good description of the ( ) of this university
A.
lawyer
B.
orient
C.
layout
D.
oven
【简答题】What word did the spider weave over the bar of Wilbur?
【单选题】When he just got off the plane, he gave us a good description of ______ in Africa.
A.
what he had seen
B.
that he had seen
C.
which he had seen
D.
he had seen what
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