单选题
By saying these figures are conservative (Line 1, Paragraph 3), Dr Worm means that ______.
A、
fishing technology has improved rapidly
B、
the catch- sizes are actually smaller than recorded
C、
the marine biomass has suffered a greater loss
D、
the data collected so far are out of date
【正确答案】
C
【答案解析】
[试题分析] 这个一道理解题。 [详细解答] 它说到现在海洋生物的总损失量是非常大的，需要保护。
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