单项选择题

Which of the following is TRUE about the north polar cap of Mars in summertime

A．It is at its largest size.
B．It is changing its shape all the time.
C．It is at its smallest size.
D．It is at its windiest tim
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单项选择题
When the speaker says that he simultaneously knew too much, and not enough , he means that he was ______.
A．more perceptive than others who were involved at this time
B．too close to the events to see them objectively
C．unable to see any significance in current events
D．confused by the number of important events that were taking place
单项选择题
According to the speaker, My Experiences in Washington will deal with ______.
A．secret documents never before released to the public
B．an "insider's" conceptualization of the government's failures
C．his personal view of that presidential era
D．the administrative problems of the president
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