问题 解答题

请将下列食品与相关的保存方法用线连起来.

①袋装牛奶              A、腌制法

②果脯                  B、高温灭菌法

③咸鱼                  C、脱水法

④干香菇                D、真空包装法

⑤袋装香肠              E、渗透保存法.

答案

因食物腐败变质是由于微生物的生长和大量繁殖而引起的.根据食物腐败变质的原因,食品保存就要尽量的杀死或抑制微生物的生长和大量繁殖,传统的食品保存方法有盐腌、糖渍、干制、酒泡等.现代的贮存方法主要有罐藏、脱水、冷冻、真空包装、添加防腐剂等.其中防腐剂是指天然或合成的化学成分,用于加入食品、药品、颜料、生物标本等,以延迟微生物生长或化学变化引起的腐败.亚硝酸盐及二氧化硫是常用的防腐剂之一.对于不同的食品特点有不同的贮存出方法.①袋装牛奶使用了 B、高温灭菌法;②果脯使用了E.渗透保存法.③咸鱼使用了A.腌制法;④干蘑菇使用了C脱水法;⑤袋装香肠使用了D、真空包装法.

故答案为:

单项选择题
阅读理解

阅读理解。

     While most high school students spend most of their time worrying about who likes who,and

different re lationships between their classmates,I choose to focus on my school lessons and sports.

     When I was young,my mother encouraged me to develop and keep friendship with boys in

order to build strong relationships. But she told me not to risk a good friendship with a boy with

the title of boyfriend. It's indeed a wise choice to stay friends with those of the opposite sex. In my

opinion, even though some high school relationships might continue after graduation,the probability

of them lasting much longer is so slim that there really is not a point to it.

     Firstly you have to think about such a question-whether it is possible to hurt both of you,or

even hurt both of your future husbands or wives. My second point is that you still can date if you

hope marriage could possibly follow. Except this,there really is not any other reason for dating.

Some students desire relationships for a chance to be romantic. While these are nice to have,there

are many more important things at this point in our lives.

     The titles of boyfriend and girlfriend put too much stress on a relationship between high school

students. Just staying as common friends may be the best choice for us. I strongly recommend we

should deal with it in an appropriate way and follow our teachers' advice if necessary.

1.The author writes this passage probably for ________ to read.

A.high school students  

B.school teachers

C.parents and teachers  

D.married couples

2.Between sexes,the relationship of being good friends might be ________ than that of being

boy/girlfriends.

A.weaker  

B.safer

C.slimmer  

D.stronger

3.How does the writer like the idea of dating among the students?

A.Dating is a nice chance for students to be romantic.

B.Studying is far more important than dating in school.

C.In high school dating can surely lead to future marriage.

D.Dating in high school is sure to hurt your future family.

4.The underlined word "it" in the last paragraph might refer to________.

A.the title of boyfriend or girlfriend at school

B.advice given by both teachers and parents

C.the pressure from school lessons and sports

D.the relationship between students of opposite sexes