The Grapes of Wrath is a masterpiece of （）
A. John Steinbeck
B. John Winthrop
C. John Updike
D. John Cotton
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（） is regarded as the“father of American literature”
A. James Fenimore Cooper
B. Ralph Waldo Emerson
C. Thomas Jefferson
D. Washington Irving
（） is regarded as the “father of free verse” .
A. Walt Whitman
B. Emily Dickinson
C. David Thoreau
D. Beecher Stowe
Which of the following is NOT a usual subject of Emily Dickenson′s poems？（）
A. Nature
B. Life and death
C. Love and marriage
D. War and peace
在计划阶段，当计划总工期大于限定总工期，或计算机网络分析结果出现负时差的情况下，必须进行计划的调整，压缩关键线路的工期。
A. 错误
B. 正确
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