What is the main idea of this passage? [originaltext]A libertarian think tank, r

游客2023-12-24  21

问题 What is the main idea of this passage?
A libertarian think tank, reckon that eliminating all travel visas to the United States would add between $90 billion and $123 billion in annual tourist spending. By one estimate, introducing visa restrictions can lower trade and foreign direct investment between a pair of countries by as much as 25% .

选项 A、Visa restrictions are the barrier preventing the United States from the huge gains.
B、There are a lot of restrictions on travel visas for the sake of security.
C、Foreign investors cannot go to the United States with travel visas.
D、Tourism in the United States can raise the revenue by 25%.

答案 A

解析 文章一共两句话,第一句从正面说明旅游签证的取消会为旅游业增加约上千亿的收入。第二句从反面说明加紧对签证的限制会减少贸易额和外商投资。
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