GWD15-Q14~求助NN啦~

The milk of many mammals contains cannabinoids, substances that are known to stimulate certain receptors in the brain.To investigate the function of cannabinoids, researchers injected newborn mice with a chemical that is known to block cannabinoids from reaching their receptors in the brain.The injected mice showed far less interest in feeding than normal newborn mice do.Therefore, cannabinoids probably function to stimulate the appetite.

很多哺乳动物的牛奶中都有CANNA这种东西 这种东西可以刺激大脑中某个RECEPTOR
现在为了调查这个CANNA的功能 研究者就给新生的老鼠注射了一种CHEMICAL 这种CHEMCAL可以阻止CANNA进入大脑 结果发现呢 被注射这种CHEMICAL的老鼠就变得不爱吃东西了 没有胃口了
因此 他们就觉得CANNA有损害食欲的功能

A.Newborn mice do not normally ingest any substance other than their mothers’ milk. 它能否吞什么东西 无关

B.Cannabinoids are the only substances in mammals’ milk that stimulate the appetite.
CANNA是唯一可以刺激食欲的东西 这个不像是个ASSUMPTION 像在重复结论

C.The mothers of newborn mice do not normally make any effort to encouragetheir babies to feed.
老鼠妈妈是否鼓励小老鼠吃东西 无关
D.The milk of mammals would be less nutritious if it did not contain cannabinoids.
奶是不是有营养无关

E.The chemical that blocks cannabinoids from stimulating their brain receptors does not independently inhibit the appetite.
这种CHEMICAL没有影响老鼠食欲 换言之 要是是因为这些老鼠被注射了这种CHEMICAL而变得没有胃口 那么就不能说明是CANNA坏了他们的胃口 而是受CHEMICAL影响它们变得没啥APPETITE 那么CANNA就没有这个功能 因此要先排除掉CHEMICAL会影响食欲 才能得出题目的结论：CANNA有影响食欲的功能 所以这个选项正确