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【单选题】
在开放条件下,一个经济社会贸易均衡的条件是( )。A.
MRT = P X /P Y
B.
MRS = P X /P Y
C.
X C =X P ，Y C =Y P
D.
P X （X C -X P ）= P Y （Y P -Y C ）
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反馈参考答案：
举一反三
【简答题】按照流的处理数据的基本单位, I/O 流包括输入 和字符流。
【简答题】模板安装规定，模板安装作业高度超过（ ）m时，必须搭设脚手架或平台。
【单选题】Even though it is at least 20 years _____ we got to know, I can’t forget the scene_____ we were introduced to each other.
A.
that , where
B.
when, in which
C.
since , when
D.
since, where
【简答题】按照流的处理数据的基本单位, I/O 流包括输入 和字符流。(填三个汉字)
【单选题】-Shall we go Dutch this dinner? -Forget it.__________today. [ ]
A.
It's OK
B.
This is my treat
C.
I can't agree more
D.
No problem
【单选题】— Let's play table tennis after work, shall we? — ________ I can't wait to do that. [ ]
A.
Forget it!
B.
Think nothing of it!
C.
Why not?
D.
Not at all.
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