A great difference between American social customs and those of other countries is the way in which names are used. Americans have little concern for "rank", especially socially. Most Americans do not want to be treated in any especially respectful way because of their age or social rank; it makes them feel uncomfortable. Many Americans even find the terms "Mr.", "Mrs." or "Miss" too formal. People of all ages may prefer to be called by their first names. "Don’t call me Mrs. Smith. Just call me Sally." Using only first names usually indicates friendliness and acceptance. However, if you do not feel comfortable using only first names, it is quite acceptable to be more formal. Just smile and say that after a while you will use first names but you are accustomed to being more formal when you first meet someone.
Very often, introductions are made using both first and last names: "Mary Smith, this is John Jones." In this situation you are free to decide whether to call the lady "Mary" or "Miss Smith". Sometimes both of you will begin a conversation using last names, and after a While one or both of you may begin using first names instead. You have a choice: if you don’t want to use first names so quickly, no one will think it impolite if you continue according to you own custom.
Which of following statements is true

are tired of their everyday lives

feel inspired by the heroic deeds of the good guys

want to see who win in the end

have to cope with many problems in their lives

进货验收义务

保持产品质量的义务

有关产品标识的义务

遵守有关禁止性规范

不作为的义务

专利权人的权利分为人身权利和财产权利

发明专利权的期限为20年，实用新型和外观设计专利权的期限为15年，均自申请之日起计算

专利权的终止有期限届满终止和提前终止两种情况

授予外观设计专利的条件为：新颖性、创造性和实用性

侵犯专利权的诉讼时效是2年，自专利权人或利害关系人得知或者应当得知侵权行为之日起计算

are a potential source of cures for some incurable diseases

as a region have the lowest incidence of life threatening diseases

are of the most intense interest to medical and chemical scientists

as a region produce about one percent of modem medicines

我绝对肯定他是诚实的。

对于他的诚实，我是绝对肯定的。

他的诚实，我是绝对肯定的。

他是诚实的，对于这一点，我是绝对肯定的。

产业结构不断优化 

城市化进程逐步推进 

居民生活水平下降 

国民收入分配改善

16，16

16，32

32，32

32，16

Silence is unnatural to man. He begins life with a cry and ends it in stillness. In the interval he does all he can to make a noise in the world, and there are few things 21 he stands in more fear than of the 22 of noise. Even his conversation is 23 a desperate attempt to prevent a dreadful silence. If he is introduced to a fellow mortal and a number of pauses occur in the conversation, he regards himself as a failure, a worthless person, and is full of 24 of the emptiest-headed chatterbox. He knows that ninety-nine percent of human conversation means 25 the buzzing of a fly, but he longs to join in the buzz and to prove that he is man and not a wax-work figure. The object of conversation is not, 26 the most part, to communicate ideas; it is to keep up the buzzing sound. Most buzzing, 27 is agreeable to the ear, and some of it is agreeable even to the 28 . He would be a foolish man, however, who waited until he had a wise thought to take part in the buzzing with his neighbors. Those who despise the weather as a conversational opening seem to be ignorant of the reason why human beings wish to talk. Very few human beings join in a conversation in the hope of learning anything new. Some of them are 29 if they are merely allowed to go on making a noise into other people’s ears though they have nothing to tell them except that they have seen a new play. At the end of an evening during which they have said nothing at immense length, they justly 30 themselves on their success as conversationalists.

间接税 

直接税 

从价税 

从量税