70001次是（）货物列车。A.超限 B.重载 C.冷藏 D.普通

已知函数f(x)=x²+2x+a，f(bx)=9x-6x+2，其中x∈R，a，b为常数，则方程f(ax+b)=0的解集为

            。

To see the world is one thing；to have someone to share it with is another.Indeed，travel becomes more interesting when you have a travel partner.A travel partner can be a close friend，a family member，a pal you’ve met online，or a business friend.

You can have someone to talk to

Traveling alone is fun，but wouldn’t you feel lonely？Having a travel partner can remove the feeling of loneliness.This is especially true if you can get a travel companion who is very familiar with the place you’re traveling to.You don’t have to ask any information from the locals，and you can increase the time you spend in the country.

__________________________

One of the major headaches in traveling is the costs involved.You can’t simply ignore the rising price of hotels or plane tickets.You should also think about your daily needs，such as your food.Of course，you can’t simply go back without bringing any souvenirs (纪念品) to your friends and family.All these can ruin your budget.However，when you have a travel friend，you can have someone to share the expenses with.

You can meet a good friend

Having a travel mate is a good way of meeting a new friend or even a lifelong partner.You can never count the number of couples who actually found their way into each other’s heart while traveling together in another country.

You can have someone to watch out for you 

When you’re in a foreign land，you’ll never be really safe.You don’t know the rules as well as the culture of the people.A travel mate will be perfect to remind you of your duties in the country and to watch your back just in case you get lost.So why don’t you find a travel companion now?

Let’s find out how ...

小题1:What’s the author’s purpose in writing this passage?

A．To introduce a travel company.

B．To encourage us to have a travel partner.

C．To explain how to be a perfect travel partner.

D．To tell an interesting experience with a travel partner.小题2:What’s the best title for the 3rd paragraph?

A．You can have someone to share the expenses with.

B．You can know the local culture well.

C．You can enjoy food with your partner.

D．You can save money by bargaining together.小题3:Which of the following statements agrees with the author’s opinion?

A．Traveling alone is not fun.

B．Buying souvenirs isn’t necessary.

C．Many people fall in love when traveling.

D．It’s better to choose a stranger as a travel partner.小题4:The following paragraph will probably talk about________.

A．how to get along with a travel partner

B．how travel can benefit people

C．what we can learn from travel

D．how to find a travel partner

对于慢性扁桃体炎反复急性发作，常用的有效的治疗方法是（）

A.药物治疗

B.免疫疗法

C.物理疗法

D.激光治疗

E.手术治疗

项目监理机构与建设单位、设计单位、施工单位，以及政府有关部门、社会团体、工程毗邻单位之间的协调属于( )的协调。

A．系统内部机构之间

B．系统与近外层

C．系统与远外层

D．系统与外部环境之间

义齿设计中使用近，中支托和应力中断卡环的目的是（）

A．增加义齿固位

B．方便义齿取戴

C．增加义齿的强度

D．减少基牙的扭力，减轻基牙负荷

E．以上都不是