汽车由静止启动,获得动能,是因为其后轮(后轮为驱动轮)受地面的摩擦力向前,做正功。
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点动能的微分等于作用于质点上的力的元功。
A. 对
B. 错
若力使刚体做加速运动,则力必对此刚体做功。
A. 对
B. 错
Fill in the following blanks with words given below. Change the forms where necessary.1) Customs duty and VAT is a major source of government ________ in China.2) Shanghai Customs College is one of the ________ training centers for the WCO in Asia-Pacific region.3) By ________ the data, we can pick out the goods that are most suspicious.4) The United States introduced the ________ resolution late Wednesday, and the final one will come out next week.5) CITES (the Convention on International Trade in Endangered Species of Wild Fauna and Flora, also known as the Washington ________ ) is a multilateral treaty to protect endangered plants and animals.6) Customs management is a(n) ________ part of the school’s curriculum.7) At the beginning of February, the General Administration of Customs of China (GACC) published China’s import and export ________ of the previous year.8) The United Kingdom is officially ________ in the war.9) I look forward to your ________ rather than qualitative analysis of such a proposal.10) The 21st century is a time for significant change and ________ in Customs.11) The Foreign Secretary's remarks ________ an ambiguous statement issued earlier this week12) The success of modern business is greatly dependent on the speed of its ________ flow13) ________ customs procedures are the expectation of our partner from the business.14) ________ in IT can greatly improve the efficiency of risk management.15) There is a(n) ________ listing of all airlines at the inquiry of the airport.16) Do you have ________ reasons for your absence?
1. Complete the following statements with phrases from the above box. You may change the form of the phrases according to the Chinese given.1) __________________________________________,(原则上我们希望海关IT系统能全国一致)but in practice there are different sub-systems in various regional customs.2) _________________________________________(我们希望能在最大程度上促进贸易) on the basis of effective Customs control.3) ________________________________________(货物的是按照风险大小由低向高排列) in our IT systems for risk-management.4) We will introduce to you the concept of transaction price, ____________________ ______________________. (也就是根据海关估价协议首选的价格)5) _______________________________________ , (降息对于股市有短期影响) but in the long run it is the economy development that has the final say to it.6) We need to classify the enterprise into different categories, ___________________ ________________________. (考虑到不同企业的货物有着不同的风险)7) _______________________________________ (值得注意的是) different countries have their own specific rules of origin.8) The impact of Customs on economic development is evident __________________ ________________________. (在全球和当地层面都是如此)9) Unlike the situation in the past, _______________________________________. (企业可以自由选择在中国境内何处报关)10) When we apply the principles for Customs valuation, ______________________ _________________________. (我们首先得确认这是一起独立对等交易)