炫耀心理是（）价高的商品，以显示自己的地位、身价。
A、认知
B、了解
C、符合
D、追求
参考答案：D
He is so ________ that nobody can ________ with him. [ ]
A. strange; get along well
B. nice; get along well
C. strange; get on badly
D. nice; get on
李嘉图比较成本论的核心是（）原则。
