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There is (i)______ evidence that the giant African land snail a. fulica is a serious threat to the spread of human disease. Giant snails do carry rat lungworm-infection by which is a common cause of meningitis-but so do many other snail species. Moreover, if the threat posed by a. fulica were (ii)______, one would expect to see an increase in disease rates (iii)______ a rise in the spread of snails. However, in places like New Caledonia, explosions in giant snail populations have coincided with a fall in the number of meningitis cases.
- corresponding to
- giving way to
little , major , corresponding to 显示答案