There are many important rules which can keep...

There are many important rules which can keep us safe in our daily life.

In a fire

Escaping (逃) from a fire is a serious matter. Knowing what to do during a fire can save your life. It is important to know the ways you can use and show them to everyone in the family. For example, you can use stairways(楼梯), roofs and fire escapes, but no lifts. From the lower floors of buildings, to escape through windows is possible. The second floor window is usually not very high from the ground. It is safer to jump a short way than to stay in a burning building. Windows are also useful while you are waiting for help. Be sure to keep the door closed, before opening the window. Otherwise（否则）, smoke and fire may be drawn into the room. Keep your head low next to the window to be sure you get fresh air.

In earthquakes

Here are some tips on how to stay safe in earthquakes. Get under a desk or table, or stand in a corner or under a doorway. Cover your head and neck with your arms. Stay in your seat if in a cinema or a theater. Get below the level of the back of the sea and cover your head and neck with your arms. Try to stay away from kitchens, where there are often many objects that might fall or get hurt.

Traffic rules

It is necessary for all to keep the traffic rules in mind and obey（遵守） them strictly. When one crosses the street, he should take the crosswalk. Keep riding on the right side of the road. When the red light is on, please stop and wait until the green light is on. It is important to let the children know that playing on the road is very dangerous. Helping the aged and children cross the road is always a kind deed. If everyone obeys the traffic rules, it will be much safer to walk or ride on the road.

1.You can try to escape a fire through the following ways except _____________.

A.fire escapes B.lifts C.roofs D.stairways

2.According to the first passage, windows are _______________.

A.useless when a fire appears B.useful in putting out（熄灭） a fire

C.the only way of escaping from a fire D.one of the ways of escaping from a fire

3.The main idea of the second paragraph is_____________.

A.how to protect yourself in an earthquake

B.covering your head and neck with your arms can protect you in an earthquake.

C.advice for dangerous situations

D.how to stay calm in an earthquake

4.Which is the correct behavior according to the last paragraph?

A.You’d better play and ride on the road.

B.When the green light is on, please wait.

C.When one crosses the street, it is not important to take the crosswalk

D.You should keep the traffic rules in mind and obey them strictly.

九年级英语阅读单选中等难度题查看答案及解析

There are many things you can do to keep friendship strong forever.

Trust is very important in keeping any relationship strong and long lasting. If you trust the person whom you have a good relationship with and the other person also trust you in the same way, then you two have a good relationship.

You can remember important date of your friends such as their birthdays and wish them or give gifts to them on the special days. Many people say that money is the most important thing to consider, but remember friendship is not about money. You can find something small and inexpensive for their gifts or send online cards.

A friend should also always help others even when it is not very convenient. So have a helping hand ready at all times.

Sometimes distance makes relationships even closer. So, if you are far from your friends, there are many ways you can remain in contact. You can use email, chat programs, and you can also write a blog and share your daily life activities with your friends.

If there is anything that makes you happy, share it with your friends. Listen to their thoughts as well. If they have achieved something noticeable, congratulate them and celebrate with them.

I have seen good friendships and then there is unhealthy competition between two friends. Though this may not happen in many cases, it is better to keep this idea in mind since it may happen to you.

As far as I have seen and experienced, it will be better not to either lend to or borrow money from your good friend. Of course, we have to do this with friends. But, attention should be paid so that your friendship may not end.

How to Keep Your Friendship Stronger

九年级英语填空中等难度题查看答案及解析

—There are　　 many clubs in our school that I can’t decide which one to attend.

— I 　　 a member of the dancing club for over a year. Would you like to join us?

A. such; have been　 B. so; have been

C. such; have become D. so; have become

九年级英语单项填空中等难度题查看答案及解析

Bacterial Quorum Sensing

Bacteria(细菌)play an important role in our lives. They can keep us alive as well as make us sick. It wasn’t until fairly recently that we learned bacteria can communicate with one another.

In the 1960s, researchers found that a kind of bacteria called Vibrio fischeri（费氏弧菌） produced no light when they were alone, but that they exhibited great amount of light as the bacterial population grew to a certain number. How did this happen? How can Vibrio fischeri tell the difference between times when they’re alone and times when they’re in a community, and then all do something together?

Researchers found they talk to each other with a chemical language—signal molecules(信号分子). Vibrio fischeri makes signal molecules, and it also has a receptor on its surface that fits like a lock and key with a signal molecule. As the bacteria increase, more and more signal molecules are sent into the environment. When signal molecules increase to a certain amount, they lock down into those receptors and information comes into the bacteria, which tells them how many neighbors there are. As soon as they realize the population has hit the certain number, all of the bacteria behave as a group, making light together. In the past ten years, researchers have found all bacteria have systems like this: they make and recognize chemical words, determine(判断)the size of the community, and carry out tasks that would be unsuccessful if a single one were to act alone. This process is called quorum sensing.

Most of the time, bacteria live with thousands of other species (种类)of bacteria. There has to be a language of interspecies communication. In fact, bacteria have another kind of signal molecule, which is the common language used by all species. Moreover, this kind of molecule has its own receptor. In this way, bacteria are able to count different populations, and then they decide what task to carry out depending on which species has the greatest population.

Knowing how bacteria communicate could influence how we fight disease. What if bacteria can’t talk or hear? They won’t recognize when there are enough bacteria and when to exhibit the group behavior to make us sick. Researchers are developing a method—to make molecules that look like the real ones and then they lock into the receptors to jam recognition of the real situation.

On the other hand, researchers also improve the conversation of the beneficial bacteria, so they can do things that we want them to do better than they would do on their own.

1.According to the passage, what can we learn about quorum sensing?

A.Quorum sensing may happen when there is only one Vibrio fischeri.

B.Signal molecules are kept away from receptors during quorum sensing.

C.Most bacteria have similar systems to make light during quorum sensing.

D.Bacteria carry out a group task when their population hit a certain number.

2.What can we learn from the passage?

A.The more species there are, the more group actions bacteria will take.

B.In different environments, bacteria have different interspecies languages.

C.Beneficial bacteria communicate better by themselves than harmful ones.

D.To fight disease, researchers try to turn off the communication between harmful bacteria.

3.The passage is mainly about ________.

A.why bacterial population grows B.how bacteria communicate with each other

C.which bacteria help fight disease D.what scientists do to find quorum sensing

九年级英语阅读单选中等难度题查看答案及解析

The police do many things for us. They help keep our things and us safe. They help keep cars moving safely. They help people out of trouble when these people are in danger. They catch bad people, like criminals to make our society safe. They take care of people who are hurt. Then they see these people get to a doctor.

The police go around town to see that everything is all right. They get around town in many ways. Some of them walk or go by car. In some big cities, some of the police ride on horses. It is strange to see these animals in the street.

As they go around town, the police help people. Sometimes they fin d lost children. They take the children home. If the police see a fight, they put an end to it right away. Sometimes people will ask the police how they can get to a place in town. The police can always tell the people which way to go. They know all the streets and roads well.

Some police stand at crossings. They are the traffic police. They tell the cars when to go and when to stop. They make sure that the cars do not go too fast. They help children cross the street. They also help people who can't walk too well.

Without the police, our streets would not be safe. Cars might go too fast and hurt people. Lost people might never be found. The police do a good job. We need them. And we should thank them for a job well done.

1.The police do many things for us. They help keep our things and us______.

A. safe　　　　　　 B. healthy　　　　　 C. warm

2.How do some of the police get around in some big cities?

A. By taxi.　　　　 B. On horses.　　　 C. On bus.

3.In th e third paragraph of the text, “put an end to” means"______".

A. cut　　　　　　　 B. fly　　　　　　 C. stop

4.The text is mainly talking about the _　　　　 _of the police.

A. road　　　　　 B. life　　　　　　　 C. job

5.Which of the following sentences is NOT true?

A. The traffic police can show people the directions.

B. Without the police, our life would be dangerous and inconvenient.

C. In fact, the police don't offer so much help for people.

九年级英语阅读理解中等难度题查看答案及解析

阅读下面短文，在空白处填入一个适当的词，或填入括号中所给单词的正确形式。

There are many school rules in our school.For example，we have to get to school early in 1. morning.I don't agree 2. that because it's so early that we don't have enough sleep.What's 3.(much)，we can't take mobile phones to school.If we do，our teachers will 4.(is) angry and take our mobile phones away.In 5.(I) opinion，we should be 6.(allow) to do that.Mobile phones now are very useful.We can use them not only to communicate with parents and friends in time but also 7.(search) for information on the Internet.8.(it) bring us many conveniences.What's worse，we have to take extra(额外的)classes on weekends.To be honest，9.(take) extra classes doesn't work very well.

All in all，school rules are good for us teenagers，10.some are too strict.I think some of them should be changed.

九年级英语语法填空中等难度题查看答案及解析

Though there are so many things around us that go ______ our will, we can’t give up because following the dream is valuable.

A.through B.towards C.against D.beyond

九年级英语单选题困难题查看答案及解析

— It often rains in the south of China.

— So many raincoats are on sale. They can help us keep _______ rain.

A. in　　 B. on　　 C. up　　 D. off

九年级英语单选题困难题查看答案及解析

根据材料内容，用正确的信息完成表格，每空一词。

There are many good ways you can help your child prepare for tests. Keep in mind that test results for younger children are not as true as for older students. If a young child is hungry, tired or upset, this may result in a poor test score. Here is some advice on how you can help your child do his or her best on tests.

Read aloud with your child

Reading aloud helps develop vocabulary and a positive attitude (积极的态度) toward reading. Reading together is one of the best ways you can help your child

succeed in school.

Share experiences

You can show your child how you make cookies, plant a garden, or make a map of your neighbourhood, and then you do them together. These activities help build skills that are tested such as following directions.

Help your child know what to expect

Read and discuss with your child the test-taking advice. Letting your child know testing procedures (程序) and helping him or her know what to expect can

improve test scores.

Help your child with his or her homework

Set up a quiet study area for homework. Make sure this area has pencils, paper, a ruler, a dictionary, scissors, glue, and so on. Check your child’s homework and offer to help if he or she has some difficulty. But remember, it’s your child’s homework, not yours. If you help too much, your child will not get much from

the activity.

Keep communicating with your child’s teachers

Attend parent-teacher meetings. This will help you get to know your child’s teachers and the families of your child’s classmates. Talk to your child’s teachers about your child’s performance in class.

1.________

2.________

3.________

4.________

5.________

6.________

7.________

8.________

9.________

10.________

九年级英语填空困难题查看答案及解析

There are many kinds of clubs in our school for you to choose from. Which one would you like ________?

A. to be　　 　　　　　 B. to attend

C. to take part in D. to join

九年级英语单项填空中等难度题查看答案及解析