简答题The ________ of a contract is the introductory paragraph that identifies the parties to the agreement. A、title B、preamble C、body D、witness简答题Written contracts and oral contracts are all legally valid forms of contract. A、正确 B、错误简答题In business, ________ means a contractual exchange of mutual promises that benefit both parties in a contract, by which one party makes a promise in exchange for the other's performance. A、consideration B、consent C、agreement D、confirmation简答题As the most important part of a contract, the body of a contract usually contains some sections: ________. A、definition clause B、basic conditions C、additional conditions D、general terms and conditions简答题Offer and ________ are the essential elements of a contract. In either case, it should be done out of one's free will and with an intention to enter into a legally binding agreement. A、enquiry B、counter-offer C、acceptance D、rejection简答题In international trade, the effective establishment of a contract must go through the five steps of enquiry, offer, counter-offer, acceptance and signing. A、正确 B、错误简答题The CISG, also known as the ________, is an important and widely adopted commercial law treaty which provides a uniform text of law for international sales of goods within its scope. A、Contract Law B、Sales Contract C、Vienna Treaty D、Vienna Convention