求与向量a=(3,-1)和b=(1,3)的夹角均相等,且模为2的向量的坐标.

题型:解答题

问题:

求与向量
a
=(3,-1)和
b
=(1,3)的夹角均相等,且模为2的向量的坐标.
考点:用坐标表示向量的数量积用数量积表示两个向量的夹角平面向量的应用
题型:解答题

此刻在我们考试时,太阳直射点大致位于图中的:

A.①

B.②

C.③

D.④

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均数的抽样误差是()

A.个体观察值和样本均数之差

B.个体观察值和总体均数之差

C.个体观察值和个体观察值之差

D.样本均数和样本均数之差

E.样本均数与总体均数之差

题型:解答题

19世纪中叶开始的巴黎改建对城市结构进行了重组,这项重组是通过( )来实现的。

A.工人住宅的建设

B.道路系统的改造

C.城市森林公园的建设

D.市政建筑物的建设

题型:解答题

我国宪法以国家根本法的形式,确立了()。

A、中国特色社会主义道路

B、中国特色社会主义理论体系

C、中国特色社会主义制度的发展成果

D、基本经济制度

题型:解答题

Work looks a better cure for poverty than welfare Especially as fewer and fewer countries will be able to afford to pay potential workers to stay at home a Victorian idea is back in favour: many poor people are better off when they are pulled back into the labour market. The idea revived first in the United States. There, in its harshest form, the unemployed work in exchange for welfare. But countries with governments to the left of America’s, including Labour Australia and Socialist France, are now also exploring ways to link income support and employment policy.

Coming from different directions, the right and the left are gradually finding new common ground. For the right, it seems deplorable to encourage the poor to rely on the state for cash, because they get hooked on government help and accustomed to being poor. For the left, it seems deplorable to allow workers to drop out of the job market for long periods, because it makes it harder for them to find new jobs. For both, the answer is to get the poor to work.

Most industrial countries have a two-tier system of social protection: a social-security scheme, where workers and their bosses make regular contributions in exchange for payments to workers when they are unemployed, sick or retired; and a safety-net, to give some income to those poor people who have exhausted their social insurance or who have none The former is usually not means-tested but, for the unemployed, is of limited duration; the latter is almost always tied to income The public tends to approve of contributory benefits, which is what designers of such schemes intended.

Safety-net benefits carry no such sense of entitlement, and are less popular. Yet they have grown more rapidly in large part because the 1980-82 recession increased the number of people of working age who had exhausted their right to contributory benefits. And an increasing proportion of the poor are people for whom the contributory systems were never designed: the young and lone mothers. In consequence, payments which carry a clear entitlement have become less significant, compared with those which appear to depend purely on state charity.

The rise in the bill for the unpopular kind of social protection comes at a time when governments want to curb state spending. It comes, too, at a time when many countries have done almost everything they can think of to protect the poor. A decade ago many on the left argued that poverty was usually caused by circumstances outside the control of the poor—a lack of jobs, disability, old age, racial discrimination, broken marriages. One way or another, governments have tried to tackle most of these problems. Still the poor remain.

The United States was the first country in modem times to()

A. investigate ways of exploiting the talents of poor people

B. insist that recipients had to work to receive benefit

C. stop paying benefit to the unemployed

D. ignore the suffering of the unemployed

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