In laboratory tests, the researchers found that after about 15 minutes of hopping, arthritictoads would travel less distance with each hop (跳跃). (50) __________These toads are soprogrammed to move, apparently, that even when in pain the toads travelled as fast and as far asthe healthy ones, continuing their relentless march across the landscape.
请在第__(46)__处填上正确答案。
A.But this advantage also has a big drawback up to % of the biggest toads suffer from arthritis.
B.The task now facing the country is how to remove the toads.
C.But arthritis didnt slow down toads outside the laboratory.
D.Toads with longer legs move faster and travel longer distances while the others are being left behind.
E.Toads are not built to be road runners -- they are built to sit around ponds and wetareas.
F.Furthermore, they soon take over the natural habitats of Australias native species.
47、 请在第__(47)__处填上正确答案。
A.But this advantage also has a big drawback up to % of the biggest toads suffer from arthritis.
B.The task now facing the country is how to remove the toads.
C.But arthritis didnt slow down toads outside the laboratory.
D.Toads with longer legs move faster and travel longer distances while the others are being left behind.
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