连续的用火就会造成灰烬的不断积累,这说明原始人类只掌握了人工用火,尚不能人工造火,所

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问题:

连续的用火就会造成灰烬的不断积累,这说明原始人类只掌握了人工用火,尚不能人工造火,所以火种的熄灭往往是一件令全部落人痛苦万分的情况,考古学家发现连续用火达数百年的,是哪一个部落()

A.云南元谋人

B.北京山顶洞人

C.陕西半坡人

D.北京猿人

考点:科普知识竞赛科普知识综合练习科普知识综合练习题库
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因父母长期在外打工,10岁的小强和年迈的奶奶一起生活。由于缺少父母的关爱和教育,他变得越来越孤僻、厌学,后来因沉迷网络游戏,为筹措上网费用进行偷窃,走上了违法犯罪的道路。这则材料给我们的启示是(    )

①要培养热情开朗的性格

②要自觉抵制不良诱惑,加强自我保护

③要自立自强

④只要加强家庭保护就能促进留守儿童的身心健康

A.②③④

B.①②③

C.①②④

D.①③④

题型:单项选择题

梁启超在《变法通议》中写道:同治初年,德相俾斯麦对人说:“三十年后,日本其兴,中国其弱乎?日人之游欧洲者,讨论学业,讲究官制,归而行之。中人之游欧洲者,询某厂船炮之利,某厂价值之廉,购而用之。强弱之原,其在此乎?”梁启超引这段话的根本意图是  [ ]

A.比较出中日近代化的异同

B.寻找甲午战争日胜中败的历史原因

C.批评洋务派的活动

D.证明中国进行社会政治改革的必要性

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阅读理解。

     An increase in students applying to study economics at university is being attributed to (归因于) the

global economic crisis awakening a public thirst for knowledge about how the financial system works.

     Applications for degree courses beginning this autumn were up by 15% this January, according to

UCAS, the Universities and Colleges Admissions Service. A spokesman for the Royal Economic Society

said applications to do economics at A-level were also up.

     Professor John Beath, the president of the society and a leading lecture at St Andrews University,

said his first-year lectures-which are open to students from all departments-were drawing crowds of 400,

rather than the usual 250.

     "There are a large number of students who are not economics majors, who would like to learn something

about it. One of the things I have done this year is to relate my teaching to contemporary events in a way

that one hasn't traditionally done." He added.

     University applications rose 7% last year. But there were rises above average in several subjects. Nursing

saw a 15% jump, with people's renewed interest in caters in the public sector (部门), which are seen as

more secure in economic crisis.

     A recent study showed almost two thirds of parents believed schools should do more to teach pupils

about financial matters, and almost half said their children had asked them what was going on, although a

minority of parents felt they did not understand it themselves well enough to explain.

     Zack Hocking, the head of Child Trust Funds, said:"It's possible that one good thing to arise from the

downturn will be a generation that's financially wiser and better equipped to manage their money through

times of economic uncertainty."

1. Professor John Beath's lectures are _____.

A. given in a traditional way

B. connected with the present situation

C. open to both students and their parents

D. warmly received by economics

2. Incomes in the public sector are more attractive because of their _____.

A. greater stability

B. higher pay

C. fewer applications

D. better reputation

3. In the opinion of most parents _____.

A. eccentrics should be the focus of school teaching

B. more students should be admitted to universities

C. the teaching of financial matters should be strengthened

D. children should solve financial problems themselves

4. According to Hocking, the global economic crisis might make the youngsters _____.

A. wiser in money management

B. have access to better equipment

C. confide about their future careers

D. get jobs in Child Trust Funds

5. What's the main idea of the text?

A. Universities have received more applications.

B. Economics is attracting an increasing numbers of students.

C. college students benefit a lot from economic uncertainty.

D. parents are concerned with children's subject selection.

题型:单项选择题

脂类包括哪两种

A.中性脂肪和类脂两类
B.甘油三酯和磷脂两类
C.甘油三酯和胆固醇类
D.甘油三酯和脂蛋白类
E.以上都不正确

题型:单项选择题

液压油的粘度指数越高,油液的粘度随温度的变化()。

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