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【简答题】
已知f(x)是定义在R上不恒为零的函数，对于任意的x，y∈R，f(x·y)= xf(y)+yf(x)成立。数列{a n }满足a n =f(2 n )(n∈N*)，且a 1 =2，则数列的通项公式为a n =（ ）。
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【简答题】1 x = x-1 x(x-1) 成立的条件是______．
【简答题】x＞1是 1 x ＜1 的______条件．
【简答题】阅读理解。 Mark Twain was a great writer. He was born in 1835 in the USA. He was also a famous speaker. He was famous for his sense of humour. Many people liked to listen to his talk because he liked to te...
【简答题】Mark Twain was a great writer. He was from the USA. He was born in 1835. He was also a famous speaker. He was famous for his sense of humour（幽默感）. Many people liked to listen to him talk because he li...
【判断题】Mark Twain (1835-1910) is one of the prominent English realism writers.()
A.
正确
B.
错误
【判断题】Mark Twain (1835-1910) is one of the prominentEnglishrealismwriters.______
A.
正确
B.
错误
【单选题】Mark Twain (1835-1910) is a prominent _________________ writer.
A.
English realism
B.
American romanticism
C.
English romanticism
D.
American realism
【简答题】完形填空。 Mark Twain was pen name of Samuel Lamghorne Clemens.He was born on November 30,1835,in a small town in Florida ,the USA/He ___ 1 ___a few naughty boys who later ___ 2 __ in his tories. At the ...
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