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单项选择题

A．She read it selectively.
B．She went over it chapter by chapter.
C．She read it slowly.
D．She finished it at a stretch.
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单项选择题Hurricane Andrew was the second costliest natural disaster in the United States.

A．Y
B．N
C．NG

单项选择题The reason why the electric eel is able to give more powerful shock is that______.

A．the working system of the electric plates in the eel is the most effective
B．the working system of the electric plates in the eel is far inferior to those in the torpedo
C．compared with those in the torpedo, the working system of electric plates in the eel is more direct and efficient
D．compared with other electric fish, the eel possesses much more electric plates