读短文，回答问题。

May: Good morning! Can I help you?

Lucy: Yes. I want some pencils and pens.

May: We have many here. Which one do you like?

Lucy: That red one, please.

May: Here you are.

Lucy: Thank you. How much is it?

May: It's cheap. It's 1 yuan.

He proposed that we _______ a meeting , which suggested he ________ in our plan .

如图所示图象关系合理的是（  ）

国际石油价格多次上涨，为解决能源危机，现在全面推广使用乙醇汽油作为发动机燃料，即在汽油中掺入一定比例的乙醇，以代替一部分汽油。已知热化学方程式：1/2C₂H₅OH(l)＋3/2O₂(g) = CO₂(g)＋3/2H₂O(l) △H＝－683.4kJ/mol。下列有关说法正确的是                                       (      )

朱熹提出“存天理，灭人欲”，这里的“天理”是指