从1～9月来看，价格变化呈下降趋势的产品是( )。
D.加工业产品

单项选择题Aristotle in The Poetics describes the purgative effects through pity and fear that tragedy has on its audience as __________.

未分类题2003至2007年全国税收总额为( )亿元。94142D.254142

未分类题In the third paragraph, 'potential customers' refers to people who ______.A.are likely to buy your productsB.are already important clients of your firmC.are not willing buy your productsD.are not interested in your products

未分类题The phrase 'on the road' in the last paragraph can be best replaced by ______.A.travellingB.relaxingC.playingD.sightseeing

未分类题Many teachers believe that the responsibilities for learning lie with the student. (1)_____ a long reading assignment is given, instructors expect students to be familiar with the (2)_____ in the reading even if they do not discuss it in class or take an examination. The (3)_____ student is considered to be (4)_____ who is motivated to learn for the sake of (5)_____, not the one interested only in getting high grades. Sometimes homework is returned (6)_____ brief written comments. but without a gradE.Even if a grade is not given, the student is (7)_____ for learning the material assigneD.When research is (8)_____, the professor expects the student to take it actively and to complete it with (9)_____ guidancE.It is the (10)_____ responsibility to find books, magazines, and articles in the library. Professors do not have the time to explain (11)_____ a university library works; they expect students, (12)_____ graduate students, to be able to exhaust the reference (13)_____ in the library. Professor will help students who need it, but (14)_____ that their students should not be (15)_____ dependent on them. In the United States professors have many other duties (16)_____ teaching, such as administrative or research work. (17)_____, the time that a professor can spend with a student outside of class is (18)_____. If a student has problems with classroom work, the student should either (19)_____ a professor during office hours (20)_____ make an appointment.A.IfB.AlthoughC.BecauseD.Since