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【单选题】
设某地区消费函数中,消费支出不仅与收入 X有关,而且与消费者的年龄构成有关,若将年龄构成分为小孩、青年人、成年人和老年人4个层次。假设边际消费倾向不变,考虑上述年龄构成因素的影响时,该消费函数引入虚拟变量的个数为A.
1
B.
2
C.
3
D.
4
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【单选题】3-2、现有一含 N H 3 P O 4 和 N a H 2 P O 4 的溶液,用NaOH标准溶液滴定至甲基橙变色,滴定体积为a(mL)。同一试液若改用酚酞作指示剂,滴定体积为b(mL)。则a 和b的关系是 ( )
A.
a>b
B.
b = 2a
C.
b>2a
D.
a = b
【多选题】How can we send out an invitation to guests?
A.
Invitation letter
B.
Invitation e-mail
C.
Invitation card
D.
Notes
【简答题】How did he feel It’s a pity that ______ will not be kind to us out of doors. But it will be nice _______ in the pictures no matter what may be on the screen. It will be grand to know we have each othe...
【简答题】Segment 3 How did he feel? It’s a pity that __1__ will not be kind to us out of doors. But it will be nice _2_ in the pictures no matter what may be on the screen. It will be grand to know we have eac...
【多选题】How can we send out an invitation to guests? 我们怎样才能向客人发出邀请呢?
A.
Invitation letter
B.
Invitation e-mail
C.
Invitation card
D.
Notes
【简答题】Hundreds of ____1___ send me ___2___ each year for __3___ about __4____. They want to know what to study or whether it's OK to drop out of ____5___ since that's what I did. A smaller number of____6___...
【简答题】Segment 3 How did he feel? It’s a pity that (8) ______will not be kind to us out of doors. But it will be nice (9) ______ in the pictures no matter what may be on the screen. It will be grand to know ...
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