仅考虑代词指代,CD都是对的。
Here we should focus on the difference between"in effect maufaturing...." and the clause introduced by "so that"
(C)强调an unintended 的过程,一个自然而言形成的结果.
(D)强调主观意动..indicates that the fish and invertebrates are actively trying to produce this internal "antifreeze", and actively process the carbohydrates in such a manner as to achieve that goal.
-- by 会员 Gail小M (2011/4/6 23:26:54)