A, Like引导对比只能跟名词。A 排除
B, Comparing any star with the hydrogen -- wrong
C, comparing the case of a star with the hydrogen; the unparallel " ejecting' phrase after 'and'
D, would作为helping verb,后面却没有跟verb,错; star对比hydrogen;读者无法通过句意知道it 代sun 还是 hydrogen。
Like humans and other warm-blooded animals, researchers report that the lotus has the remarkable ability of keeping its temperature in a narrow range.
like比较对象必须是like后紧跟的词,以及主句的主语
ultimately是将来时的标志是谁告诉你们的啊?查了牛津朗文,例句都有现在时和过去时的出现,谁说只能用将来时了