
【名词&注释】
编年体(chronological model)、纪传体史书、大孢子叶(megasporophyll)
[填空题]史书有不同的体裁,不同的体裁又有不同的特征。纪传体史书的特征是
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举一反三:
[单选题]The report from NHTSA suggests that .
A. fewer people were injured in crosswalks
B. crosswalk safety has been greatly improved
C. much has been done to reduce traffic accidents
D. pedestrian deaths in crosswalk remain a serious problem
[单选题]_________
A. private
B. global
C. different
D. practical
[单选题]下列哪一条不是影响蒸发的因素( )。
A. 药液蒸发面的面积
B. 液体黏度
C. 搅拌
D. 加热温度与液体温度的温度差
E. 蒸汽的压力
[单选题]罗汉松科的大孢子叶特化为( )。
A. 珠托
B. 套被
C. 盖被
D. 珠鳞
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