题目内容

1947年10月发布的《中国人民解放军总部宣言》正式提出的行动口号是【】
A:向北发展、向南防御
B:和平、民主、团结
C:打过长江去、解放全中国
D:打倒蒋介石、解放全中国

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Section A Dialogue Completion
Directions：In this section，you will read five short incomplete dialogues between two speakers，each followed by four choices marked A，B，C and D.Choose the answer that best suits the situation to complete the dialogue by marking the corresponding letter with a single bar across the square brackets on your machine-scoring ANSWER SHRET.
1. A：How about having lunch with me today，Paul？
B：

A. I’ll see you then.
B. Thanks a lot.
C. Sounds great.
D. I can come anytime.

According to the author，how could trust be established？

A. By economic means.
By legitimate measure.
C. By authoritative command.
D. By effort or action.

已知某垄断厂商的成本函数为TC=5Q2+100Q，产品的需求函数为P=900-5Q，请计算：
① 利润极大时的产量、价格和利润；（6分）

70________

A. upon
B. after
C. through
D. until