Carnivorous mammals can endure what would otherwise be lethal levels of body heat because they have a heat-exchange network which kept the brain from getting too hot.
OG12 SC 10.Carnivorous mammals can endure what would otherwise be lethal levels of body heat because
they have a heat-exchange network which kept the brain from getting too hot.
(A) which kept
(B) that keeps
(C) which has kept
(D) that has been keeping
(E) having kept
如果A选项是Which keeps,正确吗
刚看到杨鹏长难句上一个句子也产生了同样的困惑,求nn解释
That sex ratio will be favored which maximizes the number of descendants an individual will have and hence maximizes the number go gene copies transmitted.