单项选择题

What is the potential crisis for Google according to Jim Lanzone

A．Google overestimates its technique.
B．Google's new on-line program attracts more users.
C．Its rivals am trying to form alliance.
D．Google extends into various fields.

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单项选择题What is the central idea of this passage

A．Google dominates the on-line search market.
B．Google is confronted with stiff competition.
C．Google manages to seize more market share in software business.
D．Google's growth threatens companies like Microsoft to a large extent.

单项选择题Which of the statement is NOT true about Expert Rank

A．It searches information prevailing in experts on particular topics.
B．It even outdoes Google.
C．Ranking is seldom counted by the page's popularity.
D．Relevant information can be effectively and efficiently sought.