细筛操作时,筛子的给矿量一定要保持均匀稳定,不要超负荷给矿或过少给矿。

题型:判断题

问题:

细筛操作时,筛子的给矿量一定要保持均匀稳定,不要超负荷给矿或过少给矿。

考点:磁选工磁选工(高级)磁选工(高级)题库
题型:判断题

生态入侵的危害是什么?

题型:判断题

如果该省要求医护人员的比例至少达到1:1,那么如果各市医生人数保持不变,最缺注册护士的是哪个市()

A.G市

B.A市

C.F市

D.B市

题型:判断题

阅读理解。

     Last year more than one million Filipinos worked abroad as servants, nurses, sailors and in other difficult

but low-paid jobs. Southeast Asians leave their poorer countries for their richer neighbours.

     Many of these wage-earners return in the end. In the meantime, they send home huge amounts of money-

in the Philippines' case, over 10% of its GDP. Between January and November, the amount was up 18% on

the same period of 2005, Poverty and unemployment are still high in the Philippines and other labour-exporting

(劳务输出) countries. They would be far worse but for this outflow of bodies and inflow of dollars. As for

those Asian countries that import (输入) labour, as in Europe, falling birth rates mean they are going to need

more foreign workers.

     On January 13th leaders of the Association of Southeast Asian Nations (ASEAN) signed an agreement to

help migrant (流动的) workers-with the realization that the flow of labour between their countries is a growing

problem that they cannot blame on outsiders. A 2005 study showed that 8.4 million Southeast Asians worked

outside their home countries, but this did not include the huge numbers of Indonesians doing so without papers.

So the true total is probably rather higher.

     Of the ten ASEAN countries, the Philippines, Indonesia, Myanmar, Cambodia, Vietnam and Laos export

labour, Singapore and Brunei import it, and Thailand and Malaysia do both. Sziraczki of the UN's International

Labour Organization points out that, in the next ten years, the total labour force of the worker exporting

countries should grow by about a third. It makes sense to work on the problem before it gets out of control.

     People in the receiving countries seem to be worried about competition for their jobs. Most Thais said their

government should admit (准入) no more foreign workers, and a few thought otherwise. Even in Singapore,

just over ball of people are against admitting more foreign workers. Malaysians think that the increase in foreign

workers has worsened crime rates (犯罪率).

1. It can be inferred from the case of the Philippines that _____. 

A. the country is Asia's main source of migrant workers

B. labour exports lead to a 10% growth of its GDP

C. the outflow of labour helps solve its social problems

D. the country both exports and imports labour force

2. The flow of labour is a growing problem because _____.

A. there is a greater flow of labour than reported

B. more Indonesians work abroad without papers

C. some countries suffer from low birth rates

D. the ASEAN is against admitting foreign workers

3. For the labour-importing countries, the flow of labour may lead to _____.

A. higher birth rates

B. lower crime rates

C. greater money inflows

D. stronger job competition

4. The writer of the text seems to _____.

A. support the flow of labour between countries

B. report fairly on the question of labour flow

C. express his worries over the ASEAN's decision

D. regard the outflow of labour as a serious problem

题型:判断题

某码头沉箱条形基础,基底下为抛石基床,受压宽度B1=9.0m,抛石基床下换填砂垫层,厚2m,γ=20kN/m3,砂垫层底面有效受压宽度12m,已知砂垫层底面最大和最小压力分别为210kPa和125kPa,计算作用在砂垫层底面单位有效宽度的平均压力设计值接近()(γσ=1.0)。

A.167kPa 

B.145kPa 

C.125kPa 

D.100kPa

题型:判断题

关于完全垄断市场的正确表述有()。

A.完全垄断企业的需求曲线就是行业的需求曲线

B.企业生产的产品没有十分相近的替代品

C.企业是价格的接受者

D.需求曲线是一条水平线

E.需求曲线向右下方倾斜

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