题目内容
商业汇票的持票人未按照规定期限提示承兑的，将丧失对其前手的追索权。()
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SECTION B PASSAGES
Directions: In this section, you will hear several passages. Listen to the passages carefully and then answer the questions that follow.
听力原文： The limits of a person's intelligence are fixed at birth, but whether or not he reaches those limits will depend on his environment. It is easy to show that intelligence is, to some extent, something we are born with. The closer the blood relationship between two people, the closer they are likely to be in intelligence. Thus if we take two unrelated people at random from the population, it is likely that their degree of intelligence will be completely different. If on the other hand, we take two identical twins, they will very likely be as intelligent as each other. Relations like brothers and sisters, parents and children, usually have similar intelligence, and this clearly suggests that intelligence depend on birth.
Imagine now that we take two identical twins and put them in different environments. We might send one, for example, to a university and the other to a factory where the work is boring and fixed. We would soon find differences in intelligence developing, and this indicates that environments as well as birth plays a part. This conclusion is also suggested by the fact that people who live in close contact with each other, but who are not related at all, are likely to have similar degrees of intelligence.
In the development of one's intelligence, environment plays ______.
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