题干

泡菜是一种特色小吃,酸奶是有益的酸性乳品,这是利用何种微生物的发酵作用 (   )

A:酵母菌

B:霉菌

C:甲烷细菌

D:乳酸菌

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答案(点此获取答案解析)

D

同类题2

阅读下文,回答相关问题。

                                                                                                                                               往事依依
        老师入情入理的讲课也在我心上雕镂下深刻的印象,培养了我课外阅读的兴趣。国文老师教古文喜欢大声朗诵。记得一次教辛弃疾的词《南乡子·登京口北固亭有怀》,老师朗诵时头与肩膀左右摇摆着,真是悲歌慷慨,我们这些做学生的,爱国情怀油然而生。此后我每次登上满眼风光的北固楼,望着滚滚长江水,回顾千古兴亡事,总是感慨万端。不用说,这首词我至今还能背得滚瓜烂熟。我就是从那时开始爱读辛弃疾词的。也是在初中读书时,来了一位代课的国文老师,是年轻的新派人,他喜欢教白话文。有一次,教到田汉《南归》中的诗:“模糊的村庄已在面前/礼拜堂的塔尖高耸昂然/依稀是十年前的园柳/屋顶上寂寞地飘着炊烟”。老师朗诵着,进入了角色,那深深感动的神情凝注在眼睛里。这种感情传染了整个教室,一堂鸦雀无声,大家都被深深感动了。这几句诗镌刻在我心上,几十年过去了,至今还能信口背出。此后,我对新文学更有兴趣,读了许多有名的中外小说,开阔了眼界,使自己的心与时代更加贴近了。如今只要稍一回忆,就仿佛看到国文老师那左右摇晃的身子和那注满情思的眼睛。             

同类题5

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    Having experienced a shocking electrical accident, which caused him to become both blind and deaf, James Franco's world became completely dark and quiet for almost ten years. The loss of sight and hearing threw him into such sorrow that he tried a few times to put an end to his life. His family, especially his wife, did their best to tend and comfort him and finally he regained the will to live.

    One hot summer afternoon, he was taking a walk with a stick near his house when a thunderstorm started all at once. He stood under a large tree to avoid getting wet, but he was struck by lightning. Witnesses (目击者) thought he was dead but he woke up 20 minutes later, lying face down in muddy water. He was trembling badly, but when he opened his eyes, he could hardly believe what he saw: a tree and a muddy road. When Mrs. Franco came running up to him, shouting to their neighbors to call for help, he could see her and hear her voice for the first time in nearly ten years.

    The news of James regaining his sight and hearing quickly spread and many doctors came to examine him. Most of them said that he regained his sight and hearing from the shock he got from lightning. However, none of them could give a compelling answer as to why this should happen. The only reasonable explanation given by one doctor was that, since James lost his sight and hearing as a result of a sudden shock, perhaps, the only way for him to regain them was by another sudden shock.