[size=12.0012px]Found even in ancient Egyptian mummies, the parasitic Guinea worm became the focus of a global public health campaign in 1986; this species of parasite has declined for two decades, and may finally be eradicated from the earth by 2010.
[size=12.0012px] | | Found even in ancient Egyptian mummies, the parasitic Guinea worm became the focus of a global public health campaign in 1986; this species of parasite has | | | Being the focus of a global public health campaign since 1986 and found even in ancient Egyptian mummies; the population of the parasitic Guinea worm has | | | Having been the focus of a global public health campaign in 1986, it was found even in ancient Egyptian mummies; the frequency of the parasitic Guinea worm | | | Being found even in ancient Egyptian mummies and having been the focus of a global public health campaign since 1986, the frequency of the parasitic Guinea worm | | | Having been found even in ancient Egyptian mummies and being the focus of a global public health campaign since 1986, the parasitic Guinea worm species |
[size=12.0012px]不知道能不能正常显示,因为是直接复制过来的,我选的是B,明显只有population才能decline嘛,结果正确选项是A。为什么啊????一个species能直接decline吗????
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