Rats are often associated with spreading disease rather than preventing it, but this long-tailed animal is highly sensitive.
2017年12月四级真题(第一套)阅读 Section A
Rats are often?associated with spreading disease rather than?preventing it, but this long-tailed animal is highly?sensitive Inside a rat's nose are up to 1, 000 different types of olfactory receptors whereas humans only have 100 to 200 types.
2017年12月四级真题(第一套)阅读 Section A