题目

下列反应中，不属于氧化还原反应却是吸热反应的是A.Ca(OH)2和NH4Cl反应            B.钢铁生锈 C. H2与CuO高温反应              D.乙醇与O2的燃烧反应   答案：A解析:考查常见的放热反应和吸热反应。BCD均属于氧化还原反应，其中BD是放热反应，C是吸热反应。答案A。 Learning just as much outside the Classroom     Every Thursday afternoon，my art history class meets not in our usual lecture hall hut in the Yale University Art Gallery(美术馆)．     We spend our one-hour class discussing two or three of the paintings，many of which are by artists that we have already studied in class.     The professor begins by selecting one work of art .After giving us a quick background on the artist，he'll open up for class discussion. Everyone is strongly encouraged to give opinions to the work．Not every piece we study is necessarily famous or striking in appearance and subject matter，yet we always manage to make some interesting observations.   In America，professors always take every opportunity to push textbooks aside and expose students to real world experiences．   With some creativity，almost any subject can be applied to such beyond the classroom learning．   My art history class trips to the gallery are but one example．   Many other disciplines (学科)also offer opportunities to learn outside the classroom，for instance，business，psychology，art，journalism and biology．   A friend of mine from Yale taking an advanced psychology course spends every Saturday working with mentally disabled children．   Her mornings are spent playing with the kids and studying their sometimes uncontrolled behavior. Then in the afternoon she writes a report on her observations．   Students generally appreciate these unique learning opportunities．They're almost always fun and interesting，and professors like them because students learn so much in just a few short months．     No one denies(否认) the value of classroom learning．But it can only take students so far．     Slides and textbooks may do a good job of carrying facts and dates，but creativity and originality (创造性)of thought cannot be taught．They can only be got through first-hand experience． 1．The writer studies art history         ．     A．in a lecture hall                                              B．in an art gallery     C．in a simple way                                             D．in a practical way 2．To study artists，we should first                   A．meet and talk with them                      B．pay a visit to their hometowns     C．get some information about their background     D．copy some works of theirs 3．In American universities it is popular for professors to           ．     A．create textbooks by themselves     B．teach their lectures through real world experiences     C．ask their students to memorize the texts     D．share their experiences with the students 4．The writer introduces one of his friends' experiences to us in order to             A．give us an example                                        B．praise the professor     C．praise his friend                                           D．advise us to study psychology 5．The writer holds the opinion that        A．learning outside the classroom is the best way     B．teachers should develop students' creativity     C．professors had better shorten their lectures     D．students should put their textbooks away