题目:
刀具角度越大,切削力()。
A.越大
B.越小
C.不变
D.不断变化
答案:
参考答案:B
刀具角度越大,切削力()。
A.越大
B.越小
C.不变
D.不断变化
参考答案:B
阅读理解。 | |||||||||
Part One China's worst drought in fifty years is doing harm to most of the country's south. Hubei, Hunan, Jiangxi, Anhui and Jiangsu provinces have suffered the most because of little rain.35 million people have been affected by the big thirst, according to China's Ministry of Civil Affairs. 4 million of them cannot get safe drinking water. Dongting Lake in Hunan has now become smaller by two thirds. Gao Yibing, fisherman, said, "No eggs were produced, so there's no young fish. We would not be able to fish anything in autumn and winter." Part Two Medecims Sans Frontieres, or Doctors Without Borders, is a group that helps people in need. In 1971, some French doctors and journalists formed MSF. In 1999, MSF won the Nobel Peace Prize. Doctors of MSF go to different countries to help poor people for free. These people are sick and hurt. They do not have enough money, food or water. MSF work in more than 70 countries including Iraq and Sudan. There are wars, disasters or diseases in these countries. MSF doctors treat these sick people and speak out for them. They try to tell the world about what they see in the poor countries. This makes the world pay more attention to these places. Part Three
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1. The best title for Part One may be ________. | |||||||||
A. No Rain For Fifty Years B. The Worst Drought In Fifty Years C. No Fish For The Coming Seasons D. A Smaller Dongting Lake | |||||||||
2. Part One may be from ________. | |||||||||
A. a newspaper B. a letter C. an advertisement D. a notice | |||||||||
3. Which of the following is NOT TRUE about MSF? | |||||||||
A. It helps people in need for free. B. It's also known as Doctors Without Borders. C. It won the Nobel Peace Prize in 1999. D. All the group members are doctors. | |||||||||
4. Part Three gives us information about ________. | |||||||||
A. Beijing People's Art Theatre B. Kung Fu C. an unexpected adventure D. entertainment | |||||||||
5. By booking two tickets for 2011 China Music Valley, you can save ________. | |||||||||
A. ¥60 B. ¥100 C. ¥120 D. ¥80 |
当a=3,b=-1时
(1)求代数式a2-b2和(a+b)(a-b)的值
(2)猜想这两个代数式的值有何关系?
(3)根据(1)(2),你能用简便方法算出a=2011,b=2010时,a2-b2的值吗?
香港地产代理有一套比较完善的纠纷处理制度,根据《地产代理条例》,下列说法中正确的有()。
A.主要由监管局负责处理纠纷
B.监管局的裁决在地方法院登记后,相当于法庭的判决
C.警方可以参与处理纠纷
D.比较严重的纠纷,可直接诉诸法律
E.廉政公署不得处理物业买卖.租赁纠纷
国家标准优先采用的配合中:基本偏差a~h(或A~H)与基准孔(或轴)配合,属于()配合;j~n(或J~N)与基准孔(或轴)配合,属于()配合;基本偏差p~zc(或P~ZC)与基准孔(或轴配合),属于()配合。
A.间隙
B.过渡
C.过盈
根据《建设工程质量管理条例》规定,必须实行监理的建设工程是()
A.国家重点建设工程
B.大中型公用事业工程
C.建设单位直接发包的工程
D.成片开发建设的住宅小区工程