问题
单项选择题
在要约生效前，要约人可以( )要约，以阻止要约发生法律效力。
A．撤销
B．撤回
C．收回
D．撤销或者撤回
答案
参考答案：B
解析： 要约的撤回发生在要约生效之前，其目的是阻止要约发生法律效力；而要约的撤销是在要约生效后，对方承诺之前撤销要约的效力。选项C非法律规定的概念，可以排除。B项正确。
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在要约生效前，要约人可以( )要约，以阻止要约发生法律效力。
A．撤销
B．撤回
C．收回
D．撤销或者撤回
参考答案：B
解析： 要约的撤回发生在要约生效之前，其目的是阻止要约发生法律效力；而要约的撤销是在要约生效后，对方承诺之前撤销要约的效力。选项C非法律规定的概念，可以排除。B项正确。
| The first 50 years of the next millennium will be critical for the world’s population. By 2050 population growth should have leveled off, but by then we’ll have 10 billion people -- two-thirds as many again as we have today. The rate of population growth is something we can choose right now, though it’s not something that just happens, but a matter of human choice. The choice is a complicated one, with many variables, but it remains a choice. If we want to prevent a population explosion, we should take action now -- or assist the poorer countries to do so. They need better government, better institutions, better labor and capital markets, better schools. Anything that increases the value of women’s time and adds to the cost of caring for a child makes a woman less likely to have that child. Since big families are often seen as safety nets for illness and old age, improving poor people’s access to insurance, pensions and welfare institutions also has a major impact. This can be as simple as rural credit, providing a means of saving. Finally, there is education -- both for women and, perhaps even more important, for the next generation of children. These steps are there to be taken, but there appear to be some countries that are not seriously trying at the moment. If we cannot achieve that we will certainly not control population. That said, I don’t feel pessimistic that we are going to run out of resources: we are becoming more efficient at producing food faster than the rate at which population is increasing. There is, however, a risk that we will wreck the environment so effectively that the world will no longer be an attractive place to live. That really would be a dismal outcome, to reach world population equilibrium only to find we’d destroyed the natural environment in the process. |
To the poor people, more children means ______.
A．more happiness
B．more wealth
C．protection against certain difficulties
D．an access to insurance, pensions and welfare