问题 问答题

将“先”与“后”填入下列空格中

(1)用盐酸中和氢氧化钠溶液时,______滴加几滴酚酞试液,______滴加盐酸.

(2)稀释浓硫酸时,______向烧杯中加水,______沿着玻璃棒加硫酸.

答案

(1)盐酸和氢氧化钠反应时无明显现象,可以先滴加酚酞,使溶液呈红色,然后滴入盐酸进行实验,所以本题答案为:先,后;

(2)浓硫酸的密度比水大,溶于水放出大量的热,稀释时应将浓硫酸倒入水中,所以本题答案为:先,后.

阅读理解

阅读理解。

     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?

     Andrew Matthews, an Australian writer, tells us that making your dreams real is life's biggest challenge.

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. 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. Studying instead of

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.

1. The biggest difficulty on the road to your dreams comes from ______. [ ]

A. yourself

B. your friends

C. your school

D. your parents.

2. Which of the following isn't mentioned in this passage? [ ]

A. You may think you're not good at some school subjects.

B. Making your dreams real is life's biggest challenge.

C. You must never give up your dream.

D. Listening to English more can help you realize your dream.

3. If we have dreams in our hearts and work hard, our dreams ______. [ ]

A. can't be realized

B. can be very small

C. will come true

D. can be very big

4. How do you make your dream come true faster? [ ]

A. Remember what your dream is.

B. Don't let your dream leave your heart.

C. Keep telling yourself what you want every day.

D. A, B and C.

5. The best title (标题) of this passage is ______.

[ ]

A. How to become a writer

B. How to make your dream real

C. A big dream is made up of small dreams

D. Everyone can realize his dream

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