下列各项哪些属于个人独资企业当然解散的法定事由()A．投资人决定解散 B．投资人死亡

生产者和消费者之间的关系，主要是吃与被吃的关系，这就形成了                。一个生态系统中有多条食物链，彼此交错，形成了         。

下列变化中属于化学变化的是（　　）

A．分子的运动速度加快了

B．由一种分子变成另一种分子

C．分子之间的间隔变小了

D．一种物质的分子运动到另一种物质的分子之间去

Did you know it takes 21 days to form a good habit? Research shows that when you “stick to something” for three weeks you are more likely to reach your goals. This is important for language learners or anyone who wants to make a change.

People who try something new often “fall off the wagon”. Whether it is a plan to lose weight or a decision to learn something, life often gets in the way. Those who make up their minds to learn English are more likely to succeed if they have a short-term goal at the beginning.

How to make learning English a habit:

Set a specific goal

Example: Break up the four main skills (listening, speaking, reading and writing) and plan to do one hour of practice in each area at the same time every day.

Find a learning partner

Choose a friend to keep you moving towards your goal. Your friend doesn’t need to be a language learner. He can be someone who wants to start exercising. He can be someone who wants to write a novel. It is best if you both have a goal.

Write out how your life will change when you reach your goal

If I improve my English, I will be able to get a better job.

If I take the TOEFL test, I will be able to get into university.

If I improve my pronunciation, my customers will understand me.

Keep track of your progress

Keep track of your effort in a notebook or online list. Share your progress list with your partner.

When you reach 21 days, reward yourself! Go out for a dinner or a movie or buy yourself a treat. It will be easier to stay on your program now that you are in the habit. If you ever fall off again, put yourself back on the 21-day challenge.

65. What can be inferred from the passage?

A. Life sometimes makes people give up their plans or decisions.

B. An English learner should find a language learner as a partner.

C. A long-term goal is of importance in forming a good habit.

D. It is necessary to spend an hour on each language skill every day.

66. Why does the author advise an English learner to reward himself when he reaches 21 days?

A. Because he should share his progress with his partner.

B. Because he has had a good knowledge of English.

C. Because he would put himself on another 21-day challenge.

D. Because he has formed a good habit of learning English.

67. The best title of the passage would be “________”.

A. Taking 21 days to form a good habit

B. A research on learning English

C. Make learning English a habit

D. Setting a goal in life

公安民警带着敌情、带着险情进入实战，一定要在（）的前提下，再去规范地执行警务，这才符合警务实战的需求。

A.确保自身安全

B.案情研究

C.具有较高的执法能力

D.熟悉法律法规

一般工业锅炉应每年进行（）停炉内外部检验。

A、一次

B、两次

C、三次