问题 读图填空题

现在大力提倡无纸化办公,但是仍然不可避免的每年要产生大量的废纸,其主要成分是木质纤维,人类正努力将其转化为一种新的资源—乙醇。下图是工业上利用微生物由纤维素生产乙醇的基本工艺流程,请回答相关问题:

(1)自然界中①环节需要的微生物大多分布在______的环境中。将从土壤中获得的微生物培养在以_____为碳源、并加入______的培养基上筛选周围有_________的菌落。

(2)如上所述的筛选中获得了三个菌落,对它们分别培养,并完成环节②,且三种等量酶液中酶蛋白浓度相同,则你认为三种酶液的活性_______(填“一定相同”“不一定相同”或“一定不同”),可以通过_______进行定量测定。

(3)根据测定结果,①环节常选择木霉,则②中获得的酶是________酶。该酶至少包括______三个组分。

(4)生产中可以满足④环节的常见菌种是_________,为了确保获得产物乙醇,⑤环节要注意_________,④过程要注意避免___________。

(5)该技术虽然有广阔的前景,但存在酶的成本高等问题,为了降低成本主要从以下几方面人手改进该过程。首先要通过________等技术手段对产酶微生物改造,提高酶的产量。其次,可利用________等技术使酶能够重复利用。

答案

(1)富含纤维素(其他答案合理给分,如落叶较多等)    纤维素    刚果红   透明圈

(2)不一定相同    对纤维素酶分解纤维素后所产生的葡萄糖

(3)纤维素   C1酶、Cx酶、葡萄糖苷酶

(4)酵母菌    发酵装置密闭(或保证无氧条件等)    污染杂菌

(5)基因工程(基因突变)    固定化酶

选择题
完形填空

阅读短文, 按要求完成短文后的各项任务。

As young students, you have many dreams. These dreams can be very big, such as winning the Nobel Prize. They can also be small, such as becoming one of the best students in your class.

Once you find a dream, what do you do with it? Do you ever try to make your dream real? How can you make your dream real?

Andrew Matthews, an Australian writer, tells us that making your dreams real is life’s biggest challenge(挑战). You may think you’re not very good at some school subjects, or that it’s impossible for you to become a writer. Those kinds of ideas stop you from realizing your dream.

In fact, everyone can realize his dream. The first thing you must do is to remember what your dream is. Don’t let it leave your heart. Keep telling yourself what you want every day and then your dream will come true faster. You should know that a big dream is, in fact, made up of many small dreams.

You must also never give up your dream.(1)There will be difficulties on the road to your dreams. But the biggest difficulty comes from yourself. You need to decide what is the most important. (2)Studying ___________  ___________watching TV will help you to get better exam results, while saving five yuan instead of buying an ice cream means you can buy a new book.

As you get closer to your dream, it may change a little. This is good as you have the chance to learn something more useful and find new hobbies.

小题1:将⑴句译成中文:________________________________________

小题2:在⑵句的空白处填入适当的词使句意完整、上下文通顺。(每空一词)________  ________

小题3:回答问题:What is the first thing to make the dream come true?

________________________________________________________

小题4:写出与此句意思相近的句子。Anyone can really makes his dream come true.

___________________________________________________

小题5:从文中选出能表达该主题的句子。

______________________________________________________