专四

单选题根据下面材料，回答题.


When a snake meets a potential enemy, its primary device is

A．avoiding any observation.
B．finding a safe shelter.
C．giving a warning threat.
D．starting a quick attack.

参考答案：A进入在线模考


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1 By "dispense with all the preliminaries" (Line 7, Para. 1), the author most probably means that

A．the snakes combine all the previous three steps.
B．the snakes give up all the previous three steps.
C．the snakes follow all the previous steps one by one.
D．the snakes reverse the order of all the previous steps.

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2 A snake is most aggressive when

A．it meets a possible enemy.
B．it is caught when it is sleeping or sloughing.
C．it is disturbed unknowingly.
D．it seeks a partner in the mating season.

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3 It is difficult to predict what would happen when a snake meets a man because

A．no one has ever clearly known how he himself was bit.
B．man tends to be subjective when he describes his encouhter with a snake.
C．the aggressiveness of the snakes diversify according to different situations.
D．a snake does not begin to attack without provocation.

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