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【简答题】
Imagine living in a country torn by war. Or maybe you live in a place where there are few jobs and little chance to earn a living. Your family decides to move — not to another town, but to another country. You and your family have become immigrants. People are called immigrants when they move to a foreign country to make their homes. People become immigrants for many reasons. The most common one is economic opportunities.Most immigrants are attracted to other countries by the promise of jobs, farmland, or business opportunities. Other people become immigrants in order to get away from mistreatment or natural disasters. They are refugees. Some refugees move to avoid wars and political unrest. Others are seeking freedom to express their religious views. Still others are uprooted by disasters, such as terrible flooding or drought. Some people have become immigrants against their will. Captured in Africa, shipped to foreign lands and forced to work as slaves, many early African immigrants to North and South America came in chains. Except for Native Americans, all people came to the United States from someplace else. For nearly 500 years, immigrants have landed on America ' s shores seeking a better life. Throughout American history, immigrants often worked low­paying, dangerous jobs that other people refused to do. Immigrants from around the world helped shape American life. Many immigrants absorbed the customs and language common to most Americans. They also brought their own traditions, including music and foods. Over time, many of these traditions have become part of American life. The first European immigrants to America hoped to colonize new lands. By the mid­1500s, Spaniards had ventured into Florida, California, and the American Southwest. French immigrants arrived in the early 1600s and built their first colony in Canada. The English also arrived in the early 1600s. They established 13 colonies along America ' s Atlantic Coast. In the 1700s, England became the major power in colonial North America. But many European immigrants came to live in the English colonies. They included people from Sweden, Holland, Germany, Scotland, and Ireland. Immigrants still come to the United States seeking freedom and economic opportunities. Most new immigrants no longer come from Europe. They come mainly from Central and South America, the Caribbean, and Asia. Today, the US government limits the number of immigrants into the country each year. People who sneak illegally into the United States are called illegal immigrants, who, if caught, would be sent back to their home countries. Key Points Detailed Information (1)______ Immigrants are those who move to a foreign country to make their homes. Reasons • Most people come for (2)________ opportunities, such as good jobs, farmlands, or business opportunities. • Some move to the US to (3)________ away from wars or disasters. • Some people immigrate to (4) ________ for religious freedom. • Some people have become immigrants (5)________ , like many early African immigrants. History • French immigrants (6)________ Canada in the early 1600s and built their first colony there. • The English also came to the early 1600s and (7)________ thirteen colonies along America ' s Atlantic Coast. • In the 1700s, European immigrants came to live in the English colonies, people from Sweden, Holland and etc. are (8)________ . Today • (9)________ from the past, the origins of most new immigrants are mainly Central and South America, the Caribbean, and Asia, instead of Europe. • The US government erects dams to (10)________ the number of immigrants into the country each year in check. Illegal immigrants, if caught, would be sent back to their home countries.
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【单选题】在放大电路中,为了稳定静态工作点,可以引入下面哪个反馈?
A.
直流负反馈
B.
交流负反馈
C.
交流正反馈
D.
直流正反馈
【简答题】生命活动的调节通常是一种反馈调节机制,比如在大脑皮层的影响下,下丘脑可以通过垂体,调节和控制某些内分泌腺中激素的合成和分泌,而激素进入血液后,又可以反过来调节下丘脑和垂体中有关激素的合成和分泌。下图表示下丘脑神经分泌细胞、垂体细胞、甲状腺细胞及它们分泌的激素之间的关系,据图回答有关问题。 (1)激素B是________。 (2)人情绪激动时,血液中的激素C的含量将会_______________,...
【简答题】下丘脑是机体调节内分泌活动的枢纽,与体内的许多生理活动密切相关。下丘脑中一些细胞不仅能传导兴奋,而且能分泌激素。下丘脑与垂体之间既有神经联系又有体液联系。请根据下图提供的信息,分析回答下列问题。 科学家发现,切断C处的联系时,垂体的分泌功能未受到影响,说明()。当切断B处时,可导致生殖器官萎缩,如果恢复B处的联系,生殖器官的功能也恢复正常,由此可以推测()能产生某种物质,该物质通过()作用于垂体,...
【多选题】静力学公理及推论中哪些只适用于刚体()
A.
力的平行四边形法则
B.
二力平衡条件
C.
加减平衡力系公理
D.
力的可传性
E.
三力平衡汇交定理
F.
作用和反作用定律
【简答题】请同学们认真阅读课本"绪论“内容,明确《理论力学》的学习内容和学习目的。 2、认真阅读第一章内容,理解掌握静力学公理及推论,思考 哪些公理推论适只适用于刚体 。 3、预习1-2及1-3节内容。思考:什么是约束?工程上常见的约束有哪些?什么是受力分析?受力分析的步骤是什么?力学模型是如何建立的? 4、完成上述任务后,请同学们在作业提交中回复:”已完成“即可。
【单选题】符合慢性胃炎临床表现的是( )
A.
长期腹胀不适、餐后加重
B.
贫血、消瘦
C.
酸、呕吐、腹泻
D.
长期上腹痛、餐后缓解
E.
上腹部疼痛、向肩背部放射
【简答题】在静力学公理及推论中,哪些只适用于刚体?
【简答题】4 在放大电路中,为了稳定静态工作点,可以引入 负反馈。
【判断题】纳税人购进国内旅客运输服务,其进项税额允许从销项税额中抵扣。()
A.
正确
B.
错误
【判断题】增值税一般纳税人购进国内旅客运输服务,其进项税额允许从销项税额中抵扣。
A.
正确
B.
错误
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