The postage rate was high in the past, because post offices had to send many people to

_ the postage.

A、clean

B、cover

C、carry

D、collect

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发布时间：2022-09-19

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第1题

Sir Rowland Hill published a pamphlet entitled “Post Office Reform. Its Importance an

d Practicability” to put forth the ideas that postal rates should not be based on the distance that a letter or package travels but should instead be based on the weight of the letter or package and that fees for postal services should be collected in advance of the delivery, rather than after, through the use of postage stamps.

It is indicated in this paragraph that Sir Rowland Hill believed that postage fees _____.

A、should be paid by the sender

B、should be related to distance

C、should be collected after the package is delivered

D、should have nothing to do with how heavy a package is

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第2题

If the market rate is greater than the coupon rate, bonds will be sold at a premium.（)

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第3题

if the marginal rate of substitution is infinite o

r zero, show that the substitution effect of a price change for a good is zero.