下列物品中消费者对（）价格的敏感性程度最低。
A.洗发水
B.饮料
C.汽车
D.蔬菜
参考答案：C
What a pity! Considering his ability and experience, he _____ better.[ ]
A. need have done
B. must have done
C. can have done
D. might have done
投资项目可行性研究的意义是什么？
