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【单选题】
S N 2 反应历程不具有的特点是: ( )A.
双分子反应，反应速率与卤代烷亲核试剂两者的浓度有关
B.
反应一步完成
C.
反应分步进行
D.
反应产物的构型转化
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【多选题】以下属于习近平主席对邓小平的评价的是()。
A.
邓小平同志对党和人民的贡献是历史性的,也是世界性的
B.
邓小平同志为中华民族独立、繁荣、振兴和中国人民解放、自由、幸福奋斗的辉煌人生和伟大贡献,将永远书写在祖国辽阔的大地之上
C.
邓小平同志始终在人民中间,也始终在人民心间
D.
由于有邓小平同志大力倡导和全力推进的改革开放,中国特色社会主义才能欣欣向荣
【单选题】This passage is most likely to be ______.
A.
a survey of a book
B.
a review of the recent trend in marriage
C.
a scientific report
D.
a preface to a book
【简答题】According to a recent survey, most public colleges and universities consider an applicants grades highly important.
【单选题】A recent survey suggested that if money were not an issue, most mothers ______ not to work at all.
A.
should prefer
B.
prefer
C.
would prefer
D.
preferred
【单选题】The word 'accent'(Line 1, Paragraph 2) most probably means______.
A.
dialect
B.
emphasis
C.
attention
D.
recognition
【单选题】Which of the following, if true, would cast the MOST doubt on scientists' most recent explanation for the origin of the ocean's water?
A.
Meteorites contain only twice, and not ten times as much xenon as regular sea water.
B.
Local water from the solar nebula is found to contain as much xenon as meteorites.
C.
Water from the solar nebula contains less deuterium than was previously thought.
D.
Comets containing more than twice the amount of deuterium than was previously thought.
E.
More than twice as many meteorites as comets existed in the solar system at the time of the Earth's formation.
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