题目内容
（请给出正确答案）
Branford reef is ().
A.A hard sand shoal marked with a light
B.Completely submerged at all stages of the tide
C.Surrounded by rocks awash at low water spring tides
D.A small，low，sandy islet surrounded by shoal water
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The tall dark girl’s marriage to Doctor Reef proves to be a _____ one
A.transient
B.understandable
C.perfect
D.funny
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B．The nutrients on which coral reef communities thrive are only found in shallow waters.
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______has the worlds largest coral reef "the Great Barrier Reef".
A．Canada
B．Australia
C．Ireland
D．New Zealand
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A．provide an example of a characteristic sign of reef deterioration
B．explain how reef communities acquire sustenance for survival
C．identify a factor that helps herbivore populations thrive
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E．identify members of coral reef communities that rely on coral reefs for nutrients
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A.happy
B.miserable
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