ERP软件项目实施主要有哪些阶段，主要内容是什么？
The theme of “Mark Twain—Mirror of America” is _____.
A. Twain’s personal experience and literary creation gives a true representation of America.
B. Mark twain is one of America’s best-loved authors.
C. Twain’s colorful personal experience exerted great impact on his writing.
D. Twain’s novels are sure to be read and studied in America.
Howmany years did Mark Twain range across the country?
A. 10
B. 15
C. 20
D. 25
What made Twain become bitter late in life?
Age
B. Money
C. personal experience
D. personal tragedy
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