指南针也叫罗盘针,是中国古代发明的指南仪器。 (76) 。磁石吸铁是因为每块磁石

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题型:填空题

问题:

指南针也叫罗盘针,是中国古代发明的指南仪器。 (76) 。磁石吸铁是因为每块磁石两头都有不同的磁极,一头叫正极,另一头叫负极。人类居住的地球也是一个天然的大磁铁,两端分别是地磁南极和地磁北极。根据同性磁极相排斥、异性磁极相吸引的原理, (77) ,无论站在地球的什么地方,它的正极总是指北,负极总是指南。

中国是最早发明指南针的国家,而且也是最早把指南针用于航海的国家。11世纪末,指南针开始用于航海。 (78) ,晚上看星辰,白天看太阳,阴天下雨就依赖指南针。 (79) ,指南针装置本身也得到了改进,慢慢变成了现在的样子。

指南针的发明和应用,不仅使人们克服了远航时不易分辨方向的困难,而且也推动了世界航海事业的发展和文化交流。南宋时,一些阿拉伯商人和波斯商人学会了指南针的制造方法, (80) 。到12世纪末、13世纪初,阿拉伯和欧洲一些国家才开始用指南针来航海。

A.当时海船上的人辨认方向

B.随着指南针在航海上的应用

C.它是利用磁石指极性制成的

D.拿一根可以自由转动的磁针

E.同时又把这个方法传到了欧洲

 

指南针也叫罗盘针,是中国古代发明的指南仪()。

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题型:填空题

在横线处填上恰当的关联词,使上下文连贯起来。    

  在教育教学过程中,学生 ① 处于被动、从属地位, ② 处于主动、主体地位,这 ③ 是传统教育与现代教育观的一道分水岭, ④ 是应试教育与素 质教育全面发展的核心, ⑤ ,我们在积极推进素质教育中,要实施主体性教育。  

①_______ ②_______ ③_______ ④_______ ⑤_______

题型:单项选择题 A1/A2型题

反映休克患者微循环灌注改善最简单而有效的指标是()

A.血压

B.脉搏

C.尿量

D.皮肤色泽

E.中心静脉压

题型:单项选择题

交界性大疱性表皮松解症的基因定位于()

A.3q21-q22

B.2q33-q35

C.1q21

D.1q25-1q32

E.Xq22.3

题型:单项选择题

长平县工商局以涉嫌虚假宣传为由对王某作出没收违法所得的行政处罚决定,王某不服诉至法院。在此案的审理过程中,出现( ),适用缺席判决。

A.长平县工商局经法院合法传唤,无正当理由拒不到庭
B.长平县工商局未经法庭许可中途退庭的
C.王某经合法传唤无正当理由拒不到庭
D.王某申请撤诉,人民法院裁定不准许的,王某经合法传唤无正当理由拒不到庭

题型:单项选择题

A Trip to the Forest


One day Bob took two of his friends into the mountains. They put up their tents and then rode off to a forest to see how the trees were growing.
In the afternoon when they were about ten kilometres from their camp, it started to snow. More and more snow fell. Soon Bob could hardly see his hands before his face. He could not find the road. Bob knew there were two roads. One road went to the camp, and the other went to his house. But all was white snow. Everything was the same. How could he take his friends back to the camp
Bob had an idea. The horses ! Let the horses take them back ! But what would happen if the horses took the road to his house That would be a trip of thirty-five kilometres in such cold weather!
It was getting late. They rode on and on. At last the horses stopped. Where were they None of them could tell. John looked around. What was that under the tree It was one of their tents!

The horses stopped because ______.

A.it was getting late

B.they were tired after running for a long way

C.they knew that they had got to the camp

D.they had seen John’ s house