只有一个位于基牙唇，颊面的卡环臂，但对侧必须用高基托作为对抗，常用在紧靠缺牙间隙的基

Why should I teach my children history? That sounds like a stupid question to even ask．But, as I hear different home schooling teachers discuss history, I get the idea that there may be different reasons for teaching history．Let me briefly explain the three good reasons for studying history and two bad reasons for studying history．

The major reason I see for studying history is that we can learn from the past．I am convinced that the world would be a much better place if more people understood the successes and failures of the past and the things that made these successes and failures．However, as the unfortunately true statement goes "the one thing we seem to learn from history is that we don't seem to learn from history". Perhaps at least in teaching history, to my children I can do a small part in changing this．

A second major reason for studying history is that it is hard to understand the current political climate in the absence of an understanding of its historical context．We can’t even understand why we are and where we are without history, much less （更不必说） try to figure out where we are going or how we should get where we want to be．

I teach my children history, for one more reason．I purchased a set of historical audio （录音机） tapes for our children．My seven-year-old son listened to them over and over．It was my hope that he would become inspired by the accomplishments of people like the Wright brothers to accomplish things by himself．I think that it is good that we celebrate the accomplishments of people like Martin Luther King Jr．if, in doing so, young people are called on to stand for the principles that he stood for and accomplish what he accomplished．I also think that by studying people like Adolph Hitler, people can learn to stand against the things that he stood for．

小题1:What message can we get from the underlined sentence in Paragraph 2 ?

A．Many people aren't clever enough to learn well from the past．

B．Many people fail to make good use of history and make the same mistakes．

C．Many people feel it hard to understand history．

D．Many people have no interest in studying history．小题2:In Paragraph 3, the author shows that history is useful because _______________．

A．It makes the current political situation go smoothly

B．It helps us realize the importance of historical events

C．It helps us understand why things are the way they are

D．It helps people accept the present situation where they live小题3:Some historical figures are mentioned in the last paragraph to show ______________．

A．People can be inspired to do good, while also learning to fight against evil

B．People may also learn from bad historical figures

C．More celebrations should be held to honor their achievements

D．Today’s people can also achieve what they achieved小题4:What would be talked about in the following paragraph?

A．How to teach history effectively．

B．Some negative reasons for studying history．

C．How to get more people to study history．

D．Some bad historical figures．小题5:The main purpose of this passage is to ____________．

A．inspire the parents to teach their children history

B．show the importance of history in politics

C．explain the reasons why children study history

D．introduce the writer' s own way of teaching history

基本灯具

使用灭火器灭火，要由近及远地的灭火。

广西拥有18个国家一类口岸和一系列边境开放合作平台，（）规模居全国前列。

A、电子商务

B、期货贸易

C、边境贸易

D、国际贸易

二氧化碳闪蒸塔三段底为什么要设甲醇液位高联锁报警？