[ 我觉得B对, 题目的结论是the aproach is worse rather than better. 削弱应该是反对此结论。 E里面是加强此结论啊。 B海牛的食物适于在静水中生长,船开得快会破坏其生长环境。 支持减慢船速, 结论是反对减慢船速, 所以是削弱啊。 /QUOTE] 支持 B 結論: Therefore, this approach may in fact make things worse rather than better. 反對使用新方法!
問題: Which of the following, if true, casts most doubt on the conclusion? 懷疑此結論, 所以應該是支持此新方法! (負負得正)
B. Because the water hyacinth that manatees feed on grows best in water that is nearly still, water hyacinth beds can be disturbed or damaged by fast-moving boat traffic. ...支持新方法
E. When experimenters exposed manatees to the recorded sounds of boats moving at various
speeds, the creatures were unable to discern the sounds over normal background noise.
...反對新方法
manatees 在船速 變動的情況下, 沒有辦法分辨船聲和背景聲,
所以反而比船快速通過時(它知道船來了)可以進行閃躲更糟!!!
因此新方法讓manatees 沒辦法閃躲.......反對新方法
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