题干

对胡萝卜素的提取顺序,正确的是(    )

A:胡萝卜→粉碎→萃取→干燥→浓缩→过滤→胡萝卜素

B:胡萝卜→粉碎→过滤→干燥→萃取→浓缩→胡萝卜素

C:胡萝卜→粉碎→过滤→萃取→干燥→浓缩→胡萝卜素

D:胡萝卜→粉碎→干燥→萃取→过滤→浓缩→胡萝卜素

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答案(点此获取答案解析)

D

同类题4

阅读下面两篇文言文,完成各题。

【甲】

       崇祯五年十二月,余住西湖。大雪三日,湖中人鸟声俱绝。是日更定矣,余挐一小舟,拥毳衣炉火,独往湖心亭看雪。雾凇沆砀,天与云与山与水,上下一白。湖上影子,惟长堤一痕、湖心亭一点、与余舟一芥,舟中人两三粒而已。

到亭上,有两人铺毡对坐,一童子烧酒,炉正沸。见余大喜,曰:“湖中焉得更有此人!”拉余同饮。余强饮三大白而别。问其姓氏,是金陵人,客此。及下船,舟子喃喃曰:“莫说相公痴,更有痴似相公者!

(张岱《湖心亭看雪》)

【乙】

       从武林门而西,望保叔塔突兀层崖中,则已心飞湖上也。午刻入昭庆,茶毕,即棹小舟入湖。山色如娥,花光如颊,温风如酒,波纹如绫;才一举头,已不觉目酣神醉,此时欲下 一语描写不得,大约如东阿王梦中初遇洛神时也。______余游西湖始此,时万历丁酉二月十四日也。

       晚同子公渡净寺,觅阿宾旧住僧房。取道由六桥、岳坟、石径塘而归。草草领略,未及遍赏。次早得陶石篑帖子,至十九日,石篑兄弟同学佛人王静虚至,湖山好友,一时凑集矣。

(袁宏道《初至西湖记》)


      【注释】①昭庆:指西湖北岸的昭庆寺。②东阿王:曹植。③洛神:洛水的女神。曹植《洛神赋》中对洛神之美有极其惊艳的描写。④净寺:即西湖南岸的净慈寺。

同类题5

任务型阅读

    Do you know what a big dream is? Does a big dream show one's future? Or, is a big dream something that provides only entertainment? Children dream big dreams, but there are three barriers to realizing dreams____

The self

    Immediately following the birth of a big dream, a negative self-talk takes over and gives all the reasons why it cannot happen. This voice inside of people is the ego(自我).It's there for protecting and should be listened to. Sometimes it is right, but more often it is wrong____ That's why only a handful of people make their dream come true

Family and friends

    Family and friends are a lot the ego.____ so they will often list all the reasons why the big dreams won't come true. Sometimes, family and friends destroy dreams of those they love most, out of their own fear of those left behind.

____

    If one gets past the first two barriers, one has to face the world. It is the last and the most terrible barrier. In the past, big dreamers were locked up and sometimes even killed when they were shown to the world. Fortunately, in most of the world today, big dreamers just get laughed at ____When children feel confident and then try their best, they will be ready to accept any failure. The truth is that every great dreamer whose dreams have never seen the light of success knows failure well. They simply fail until they succeed

A. The world

B. The future

C. Most people are influenced by it

D. They want to protect those they love

E. And their big dream is to be a rock star or a famous artist

F. They often kill them before they ever have a chance to grow

G. The way to realize a big dream is with confidence and action