题目内容

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.

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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

宪法规定，父母有抚养教育未成年子女的义务，源有赡养扶助父母义务。