题目内容

下图是配置Apache服务器的一个窗口，选中目录选项ExecCGI，意味着什么？
如果将下图所示的目录选项中Indexes选中状态取消，并且虚拟主机目录中也没有相关的Index文件，客户机通过浏览器访问有关的虚拟主机目录时有何后果？

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当消费者的支付意愿大于生产者的机会成本时，资源配置最有效率。()

消费者的支付意愿衡量的是该产品的市场价值。()

与封闭经济相比，自由贸易总是能够增加社会总福利。()

Speaking Question
Directions: In this question, you will listen to a conversation. You will then be asked to talk about the information in the conversation and to give your opinion about the ideas presented. After you hear the question, you will have 20 seconds to prepare your response and 60 seconds to speak.
Narrator
Now listen to a conversation between two students.