草履虫在水中运动时主要依靠（ ） A．四肢的运动 B．纤毛的摆动 C．鳍的摆动

一百多年来，现代语言科学经历了三个重要时期，历史比较语言学、结构主义语言学和转换生成语言学分别是这三个时期的代表。对这段话最准确的复述是( )。

A．现代语言学发展了一百多年

B．现代语言学经历了历史比较语言学、结构主义语言学和转换生成语言学三大时期

C．历史比较语言学、结构主义语言学和转换生成语言学是现代语言学

D．历史比较语言学、结构主义语言学和转换生成语言学都经历了一百多年的发展

(四)根据下面图表资料回答下列问题。

1960年的农业人口比1950年大约减少了百分之几（）

A．10%

B．30%

C．50%

D．60%

Switzerland(瑞士) is famous for its watches。 However, this country didn’t invent the watch。It was the British who did it。 Here is a story of how the watch was brought to Switzerland。

Many years ago , an Englishman was travelling to Italy 。 On his way he stopped in a small town in South Switzerland。 This Englishman travelled in a carriage(马车) inside which there was a carriage watch。 This was the earliest kind of watch。 A native shop assistant (售货员) happened to see the watch 。 He wondered what it was and asked the Englishman about it。 “ It is a carriage watch 。” said the man 。 This machine tells the time but now it isn’t working 。

At once the shop assistant offered to try to repair it 。 So the traveller handed him the watch。 The assistant was a very wise man 。 So it was not surprising that he managed to repair it 。 He even remembered how it was made。 As soon as the traveller had gone on his way , he made a watch exactly the same type。

Thus the watch-making was started in Switzerland。 Today Swiss watches are sold in stores all over the world。

50 Switzerland is famous for ____________。

A 。making watches    B selling watches   C inventing watches    D the carriage watch

51。It was ______who brought a watch to Switzerland earliest 。

A  a Swiss   B an Italian     C an Englishman     D a shop assistant

52。 The earlist watches were made in __________。

A Switzerland   B England    C Italy   D a small town

53 The first Swiss watch was  made  by ___________。

A an Italian shop assistant

B an English shop assistant

C a man who came from Switzerland

D。 a man who was travelling to Italy。

54。 The carriage watch was a machine which __________。

A was put in the carriage       B wasn’t working

C told people time            D had to be repaired

甲公司将所属设备租赁给乙公司使用。租赁期间，甲公司将用于出租的设备卖给丙公司。根据合同法律制度的规定，下列表述正确的是( )。

A．甲公司在租赁期间不能出卖出租设备
B．买卖合同有效，原租赁合同继续有效
C．买卖合同有效，原租赁合同自买卖合同生效之日起终止
D．买卖合同有效，原租赁合同须经丙公司同意后方继续有效

单纯材料的替换不属于产品构造的变化，不属于实用新型的保护范围。