问题 填空题

在烧瓶里放少量的碘,并用酒精灯对烧杯微微加热,过一会儿停止加热。在此实验中可以看到,固态的碘没有熔化,而直接变成紫色的碘蒸气,这种现象叫         。停止加热后,碘的蒸气没有液化,而直接变成固态的碘,这种现象叫         

答案

升华;凝华

题目分析:由题意知,对碘加热时,碘直接由固体变为气体属于升华;停止加热后,碘蒸气直接变为固体,属于凝华现象。

点评:解决本题的关键是熟知升华和凝华的定义。

阅读理解

阅读理解。

     These days, more and more students in the UK are taking a "gap year" between their graduation

from school arid their university studies. This means that they take a year off, to do something else,

before they start their studies.

     For most students,  spending time in foreign countries is the favorite activity-and Australia is the

favorite place to go.

     Many parents,  teachers and business people agree that traveling can teach important values.

     "After a year of travcling, I felt I'ci grown up. I had learnt the importance of relationships with people, 

on all sorts of levels. "

     There arc many companies around the world that welcome these students on their projects hclping

people in poorer countries, or even in your home country.  Although you don't get paid for your work, 

this

kind of work can teach important skills-decision making and finding answers to problems.  for cxample

that will help a student in a job one day.

     Finally,  getting some knowledge and experience in an area you hope to study or work in one day

will always bc very useful.

     If several university graduates are applying for the same job, gap year work cxperience allows you

to say:  "I've already had some experience of this kind of work. "

     And that can get you the job!

根据短文内容,判断句子正(T)误(F)。

( )1. These days,  all students in the UK take a gap year.

( )2. Traveling can teach you values such as learning about relationships.

( )3. Working on projects in poorer countries is all about managing people.

( )4. Students will get paid well for their work when they help the poorer people.

( )5. University graduates with some work experience often get jobs more easily than graduates 

           without experience.

单项选择题