转移支付增加1元对总需求的影响与政府支出增加1元相同。

长期平均成本曲线一定是短期平均成本曲线最低点的连接。

中央银行对外负债的目的是（）

Henry, who works in a company, invites Mandy, his colleague, to take a picnic with him.

Henry: Hey, what are you doing this weekend?

Mandy: I    1    yet. What about you?

Henry:    2    to go for a picnic? 1 The weather forecast says it will be sunny this Sunday.

Mandy: That's a good idea    3    anything?

Henry: Yes, of course, and   4    make some hamburgers.

Mandy: OK. Then I'll bring some drinks, green tea, black tea, juice or cola?

Henry: How about    5    ? By the way, I will bring my new kitchenware for our picnic.

Mandy: New kitchenware? A cooker?

Henry: Yeah! I just bought a solar cooker last month. It's a new device that uses solar energy and it is getting popular due to its high efficiency and its environmental friendliness. People can cook easily with this new device. I'll bring some fruit and some other food. We will have a wonderful picnic!

Mandy: Wow! How amazing! I can't wait!

Henry: OK, I am    6    to our picnic! Then see you on this Sunday!

Mandy: See you!

 一般来说，在完全竞争要素市场上，厂商的要素供给曲线是水平的，且与（    ）是相等的。

Although he did not know London well, he made his way _____ to the airport.

实际资本包括厂房、设备、存货和住宅以及有价证券。

经济学主要是研究（）。

简要说明成本推动通货膨胀产生的原因。

平均储蓄倾向