如图甲是小华同学探究二力平衡条件时的实验情景. (1)小华将系于小卡片(重力可忽

题型:探究题

问题:

如图甲是小华同学探究二力平衡条件时的实验情景.

(1)小华将系于小卡片(重力可忽略不计)两对角的线分别跨过左右支架上的滑轮,在线的两端挂上钩码,使作用在小卡片上的两个拉力方向            ,并通过调整             来改变拉力的大小.

(2)当小卡片平衡时,小华将小卡片转过一个角度,松手后小卡片            (选填“能”或“不能”)平衡.设计此实验步骤的目的是为了探究                                

(3)为了验证只有作用在同一物体上的两个力才能平衡,在图甲所示情况下,小华下一步的操作是:                               

(4)在探究同一问题时,小明将木块放在水平桌面上,设计了如图乙所示的实验,同学们认为小华的实验优于小明的实验.其主要原因是[ ]

A.减少,摩擦力对实验结果的影响

B.小书片是比较容易获取的才料

C.容易让小卡片在水平方向上保持平衡

D.小卡片容易扭转.

考点:二力平衡的定义及条件
题型:探究题

下列词语中加点的字的读音,全都不相同的一项是                

A.蓦然膜拜装模作样睦邻友好

B.截肢羁绊断碣残碑佶屈聱牙

C.俸禄露富戮力同心洛阳纸贵

D.亲家告罄切中肯綮沁人心脾

题型:探究题

读读下列这些观点,你认为哪一个是老子提出来的[ ]

A.祸兮,福之所倚;福兮,祸之所伏

B.制天命而用之

C.斧斤以时人山林,林木不可胜用也

D.学而时习之,不亦说乎

题型:探究题

长时间用氧的患者吸氧时下列哪种做法不妥 ()

A.宜用鼻塞法吸氧

B.氧浓度为25%~29%

C.鼻塞用清水湿润

D.先调节流量再插鼻塞

E.停用时先关闭氧气开关

题型:探究题

假设某个消费者的全部收入都用于商品甲和商品乙两种商品类型的消费,若该消费者增加对商品甲的消费。则对商品乙的消费的边际效用( )。

A.减少

B.增加

C.不变

D.可能增加也可能减少

题型:探究题

Experts say it is not easy to get used to life in a new culture. “ Culture shock” is the term these experts use when talking about the feelings that people have in a new environment. There are three stages of culture shock, say the experts. In the first stage, the newcomers like their new environment. Then, when the fresh experience dies, they begin to hate the city, the country, the people and everything else. In the last stage, the newcomers begin to adjust to their surroundings and, as a result, enjoy their life more.

There are some obvious factors in culture shock. The weather may be unpleasant. The customs may be different. The public service systems---the telephone, post office ,or transportation --may be difficult to work out. The simplest things seem to be big problems. The language may be difficult.

Who feels culture shock? Everyone does in this way or that. But culture shock surprises most people. Very often the people having the worst culture shock are those who never had any difficulties in their home countries and were successful in their community. Coming to a new country, these people find they do not have the same established positions. They find themselves without a role, almost without an identity. They have to build a new self-image.

Culture shock causes a feeling of disorientation (迷惘). This feeling may be homesickness. When homesick, people feel like staying inside all the time. They want to protect themselves from the strange environment, and create an escape inside their room for a sense of security. This escape does solve the problem of culture shock for the short term, but it does nothing to make the person familiar with the culture. Getting to know the new environment and gaining experience--these are the long-term solutions to the problem of culture shock.

小题1:According to the passage, the more successful you are at home, _________________.

A.the fewer difficulties you may have abroad

B.the more difficulties you may have abroad

C.the more money you will earn abroad

D.the less homesick you will feel abroad小题2:.Which of the following is NOT right according to the passage?

A.“Culture shock” is a term used to describe the feelings that people experience in a new environment

B.In the second stage of “ Culture shock”, people may hate the life in the new environment

C.When you are homesick, you had better not stay at home all the time

D.Every one of us doesn’t feel culture shock in this way or that小题3:.What is the main idea of the last paragraph?

A.Escape unfamiliar environment

B.The feeling of homesickness

C.The best way to overcome (克服、战胜)culture shock: get familiar with the new culture

D.Homesickness can solve the problem of culture shock

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