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有一个由A、B和C组成的三人社会，个人对公共产品的需求函数分别为PA=100-3q，PB=200-4q，PC=400-10q。如果该公共

有一个由A、B和C组成的三人社会，个人对公共产品的需求函数分别为P_A=100-3q，P_B=200-4q，P_C=400-10q。如果该公共产品的边际成本是20元，则公共产品的社会最优产量是多少？

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更多“有一个由A、B和C组成的三人社会，个人对公共产品的需求函数分…”相关的问题

第1题

—Has Maria arrived yet？—No, she ______ an hour ago.A．was supposed to comeB．ought to have c

—Has Maria arrived yet？—No, she ______ an hour ago.

A．was supposed to come

B．ought to have come

C．should come

D．must have come

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第2题

They ____________（一定是误了火车), otherwise they should have arrived here two hours ago.

They ____________(一定是误了火车), otherwise they should have arrived here two hours ago.

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第3题

___________ （Cathy一定是误了火车). She should have arrived here two hours ago.

___________ (Cathy一定是误了火车). She should have arrived here two hours ago.

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第4题

The train arrived one hour behind（).A、planB、timetableC、scheduleD、date

The train arrived one hour behind().

A、plan

B、timetable

C、schedule

D、date

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第5题

John left home twenty minutes ago. It is usually half an hour's drive from his home to the

office here. So he ______ soon.

A．should have arrived

B．need arrive

C．must have arrived

D．may arrive

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第6题

After an hour’s train ride and half an hour’s walk, we eventually arrived at our _____

__.

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第7题

听力原文：M: It's 8: 20 . The train should have arrived at 8:00.W: Yes. Something must be w

听力原文：M: It's 8: 20 . The train should have arrived at 8:00.

W: Yes. Something must be wrong on the line.

Q: How many minutes was the train late？

(14)

A．10 minutes.

B．A quarter.

C．20 minutes.

D．Half an hour.

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第8题

John left home twenty minutes ago. It is usually half an hour's drive from his home to the

office here. So he ______ soon.

A．should have arrived

B．need arrive

C．must have arrived

D．may arrive

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第9题

听力原文：W: Jack, Where have you been？ You're supposed to get here an hour earlier.M: Sorr

听力原文：W: Jack, Where have you been？ You're supposed to get here an hour earlier.

M: Sorry, Aunt Ruth, but I'm afraid I don't know my way around Manchester yet.

Q: What can we learn about Jack from this conversation？

(17)

A．Jack is new in Manchester.

B．Jack was in a traffic jam just now.

C．Jack arrived an hour earlier.

D．Jack went to Manchester an hour ago.

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