问题 填空题

图所示的烧杯和试管里均盛有碎冰块,下面用酒精灯加热,当烧杯中的碎冰有一半熔化时,试管中的碎冰______(选填“会”、“不会”)熔化;如果烧杯和试管中的冰全部都熔化成水后,当烧杯中的水沸腾时,试管中的水温______(选填“能”、“不能”)达到沸点,______(选填“会”、“不会”)沸腾.

答案

(1)冰是晶体,若给烧杯中的冰加热时,烧杯中的冰会熔化,但在冰的熔化过程中温度为0℃,保持不变,所以试管中的冰能达到熔点0℃,但试管中的冰和烧杯中的冰的温度相同,试管中的冰不能从烧杯中继续吸热,所以不能熔化.

(2)当大烧杯中的水沸腾后,尽管不断吸热,但烧杯中的水温度不再升高,保持水的沸点温度不变;小试管中的水从大烧杯中吸热,温度达到水的沸点后,就和烧杯中的水的温度一样,就不能从烧杯中继续吸热,这时虽然达到了沸点,但不能吸收热量,所以不会沸腾.

故答案为:不会;能;不能.

阅读理解

阅读理解。

     When you think of success, you think of relative achievements in your own world. Each element of your

world is important to you, and there is no need to compare with others. You cannot affect the success of

others; you can affect your own success.

     Success is very much achievable to everybody. Believe that and you have taken the first step. If you do

not believe in yourself, then building self-esteem is your first task. However, believing in your ability to achieve

whatever you want to succeed in, is very important if you are not to be held back by self-doubt throughout

your journey to success.

     There are many things that will affect your ability to succeed, and it is best to focus on those under your

immediate control. Once you do that, then the characteristics you develop can be applied to becoming

successful in a range of activities.

     What is important to you is that, as you start to reach milestones in your ambitions, you should appreciate

your own achievements. Appreciating yourself will strengthen your self-confidence and your determination

to succeed.

     Some of the key characteristics you will find in those who are successful are perseverance, prepared to

research, plan, work hard and practice a lot even when things do not seem to be going well, and an ability to

recover and learn from setbacks. At the beginning of whatever you are trying to succeed in, a strong vision

of your future, planning, and setting yourself achievable tar gets can all play an important role.

     All these qualities, skills and characteristics can be learned and developed. But it is up to you to get things

started. Those who do not start travel nowhere. For others, life can be a continuous journey of fulfillment.

1. According to the passage, if you want to achieve success, what should you do first?

A. Don't compare with others.

B. Bring everything under control.

C. Find out what you have in mind.

D. Feel confident about your ability.

2. Why should you appreciate your own achievements according to the passage?

A. It will allow you to recover from past failures.

B. It will remind you of the vision of your future.

C. It will motivate you to continue pursuing success.

D. It will help you develop your characteristics in everything.

3. The underlined word "setbacks" (in paragraph 5) probably means _____.

A. failures

B. troubles

C. hesitation

D. depression

4. What can we learn from the last paragraph?

A. If you are stuck where you are, you cannot travel far.

B. If you don't start trying, you'll never embrace success.

C. If you are brave enough, you can get whatever you want.

D. If you don't study, you can never reach the destination.

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