货币政策传导机制

五种基本关系代数运算是（）。

A.∪，-，×，π和σ

B.∪，-，∞，π和σ

C.∪，∩，×，π和σ

D.∪，∩，∞，π和σ

患者，女。昨日洗澡后出现鼻塞、流清涕、恶寒、头痛、口淡不渴。检查见鼻粘膜淡红肿胀，舌质淡，苔薄白，脉浮紧。

患者最可能的诊断是：（）

A.鼻鼽

B.鼻窒

C.伤风鼻塞

D.鼻渊

E.鼻槁

Traveling can be a way to gain life experiences，especially during Spring Break—a week long school vacation in the United States. But what if you're a student and don't have enough money for a trip？Don't worry. Here are some useful suggestions.

Save：This probably is the most important preparation for traveling. Cut expenses to fatten your wallet so you'll have more choices about where to go and how to get there.

Plan ahead：Don't wait until the last minute to plan your trip. Tickets may cost more when bought on short notice. Giving yourself several months to get ready can mean security and savings.

Do your homework：No matter where you go，research the places you will visit. Decide what to see. Travel books will provide information on the cheapest hotels and restaurants.

Plan sensibly：Write down what you expect to spend for food and hotels. Stick to your plan or you may not have enough money to cover everything.

Travel in groups：Find someone who is interested in visiting the same places. By traveling with others you can share costs and experiences.

Work as you go：Need more money to support your trip？Look for work in the places you visit.

Go off the beaten path：Tourist cities may be expensive. You may want to rethink your trip and go to a lesser­known area. Smaller towns can have many interesting activities and sights.

Pack necessary things：The most important things to take are not always clothes. Remember medicine in case you get sick and snacks in case you cannot find a cheap restaurant.

Use the Internet：The net can help to save money. Some useful websites include www.bargains­lowestfare.com_and_www.Economictravel.com.

By planning sensibly，even students can enjoy the travel. Your travel experiences will be remembered for a lifetime.

小题1:This passage is about________.

A．how to plan your travel

B．how to travel with enough money

C．how to make your travel interesting

D．how to get life experiences小题2:Before your trip，the first thing you should do is________.

A．to make a plan of the route

B．to get information from the Internet

C．to save money by spending less

D．to buy tickets in advance小题3:The writer advises you________.

A．to share costs with any other people

B．not to go to well­known places

C．not to visit dangerous places

D．to buy anything you want to buy小题4:During your trip，________.

A．you need more shoes than clothes

B．you shouldn't look for work all the way

C．you can gain valuable life experiences

D．you should forget to do your homework

影响炉渣脱硫能力的因素有（）。

A、炉渣的化学成分

B、温度的影响

C、炉渣的粘度

D、高炉操作

目前流行病学病因模型发展的最高形式是（）

A.流行病学三角模型

B.轮状模型

C.疾病因素模型

D.病因网络模型

E.以上均不对