如图甲所示,电源电压为4.5V且保持不变,小灯泡上标有“2.5V”的字样,图乙是

题型:计算题

问题:

如图甲所示,电源电压为4.5V且保持不变,小灯泡上标有“2.5V”的字样,图乙是通过小灯泡的电流与它两端的电压关系的图像.求:

(1)当小灯泡两端的电压为2V时,灯丝的电阻.

(2)当小灯泡正常发光时,滑动变阻器连入电路的电阻是多少?

(3)当小灯泡正常发光时,整个电路的总功率是多少?

考点:欧姆定律及其应用电功率的计算
题型:计算题

阅读下列材料,按要求完成下列各题。

    When I was a child, my parents always told me that I should never talk to strangers. This was part of a whole list of things I should never do : Never accept food or candy from strangers, never get in a car with

strangers, and so on.

    But if we didn’t start a conversation with strangers, we, d never make new friends. We, d never get a

job.①We may miss the joy that comes from talking with strangers. And the more people you know, the

more chances you can find.

    The following passage offers you some advice on how to ②break the ice.

    Don‘t just stare at your shoes. Go and say “Hi” to that new guy. It will be easier to break the ice if you know more about different cultures.

    British:Beautiful day, isn’t it?

    The weather in Britain is changeable. So, it’s one of the topics the British care most about. And there’s a simple rule:Say “Yes” whether you agree with the person’s idea on the weather or not. ③ That’s

because the British start a conversation using the weather so that they can continue their talk.

    French: Where did you go on holiday?

    To talk with a French person, the safest way is to ask about his or her last holiday. French students

enjoy a 10-to-15-day holiday every two months. French employees(雇员)get more than six weeks of

holidays per year.

    American:So, where are you from?

    The US is so big and people move so often that location is always a source (来源) of talk. You can try

to find a connection with the place they’re from. For example, if someone’s from Los Angeles, you could

say : "Oh, I have a friend who studied there."

1. 将文中①处划线句子翻译成汉语。

_______________________________________________

2. 将文中②处划线短语翻译成汉语。

_______________________________________________

3将文中③处划线句子改写成同义句。

That’s because the British start a conversation using the weather ______ ______their talk.

4. What do you usually talk about to start a conversation with a French person?

_______________________________________________

5. What is the main idea of the passage?

_______________________________________________

题型:计算题

气血屏障

题型:计算题

血液透析患者最常见的并发症是

A.出血
B.致热原反应
C.低血压
D.失衡综合征
E.过敏反应

题型:计算题

地方城建档案管理部门职责主要包括(  )。

A.接收和保管所辖范围内应当长期和短期保存的工程档案和有关资料

B.对城建档案工作进行业务指导,监督和检查有关城建档案法规的实施

C.对工程档案资料进行涂改、伪造、随意抽撤或损毁、丢失的,应按有关规定予以处罚

D.工程档案资料应随工程进度及时收集、整理,并应按专业归类

E.列入向本部门报送工程档案范围的工程项目,其竣工验收应有本部门参加并负责对移交的工程档案进行验收

题型:计算题

改革开放三十多年来,中国人的拜年方式经历了从书信、电报到电话、短信、电子邮件、QQ乃至微博的变迁。这意味着科技进步()

A.是文化创新的根本动力

B.促使了新传媒代替旧传媒

C.丰富了文化传播的方式

D.推动了文化的交流与融合

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