Q: What do you mean by obstacles?

School answer analysis: 1. The Modern Chinese Dictionary explains the barrier as follows: (1) The walls of ancient military camps generally refer to fortifications. (2) Metaphor opposites and boundaries.

2. In international trade, various means and measures that affect and restrict the free circulation of goods are called trade barriers or trade barriers. Such barriers can generally be divided into tariff barriers and non-tariff barriers.

1) The so-called tariff barrier refers to the trade barrier formed by the customs established by * * * to levy tariffs on importers and exporters when import and export commodities pass through a country's customs territory.

2) Non-tariff barriers refer to trade barriers formed by all import restrictions except tariffs, which can be divided into direct restrictions and indirect restrictions. Direct restriction means that importing countries take some measures to directly restrict the quantity or amount of imported goods, such as import quota system, import license system, foreign exchange control, minimum import price, etc. Indirect restrictions are indirect restrictions on the import of goods through the formulation of strict laws and regulations, such as discriminatory procurement policies, harsh technical standards, health and safety regulations, inspection and packaging, labeling regulations and other mandatory technical regulations.

Through careful listening and practice tests, I got 7 1 in Advanced Mathematics (I), passed it smoothly, and finally graduated! Thanks to the school.

Although I signed up for the online school course before the 10 exam, I only listened to the cross talk because of time. The cross talk part has combed the whole book well before the exam, which is really helpful. 5438+ 10 The first exam was held in June, and I took six written tests, all of which passed, with an average score of over 75. I am very happy. I sincerely thank the school for providing such a good learning exchange platform for our self-taught students, and I feel that learning is no longer lonely and helpless.