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与银行业务集中法相比较，邮政信箱法不仅可以加快现金回收，而且还可以降低收账成本。()
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如果销售具有较强的周期性，则企业在筹集资金时不适宜过多采取负债筹资。()
酸性和碱性氨基酸除α-氨基和α-羧基为可游离的极性基团，其R基团也有可游离的极性基团。今测得天冬氨酸的pK为2.0、3.9和10.0，其等电点(pI)该是
According to the passage, which of the following is not true？
听力原文： The Human Genome Project, a great $ 3 billion, 15-year task aimed at drawing the genetic map of humans, is now more than 90 percent complete. The scientific and medical communities are very excited about the chances genetic research provides for getting rid of diseases and prolonging human life. But those communities and policy makers are also careful about the scientific door they are opening as the project uncovers the mysteries of life.
For the last few years, the genetic advances in the fast developing field of biotechnology have provided materials for all kinds of work, but the developments of modern science in unlocking the secrets of human genetic code have opened a world of possibilities for human health, as well as for the population imagination.
While European and Japanese researchers are making rapid progress in decoding human DNA, the leading organization for genetic research in the Untied States, which began in 1990, is "unlocking the code" of the human body to learn how to defeat fatal diseases. Already, the Human Genome Project has become widely known and praised for finding the genes connected with as yet terrible diseases, and making progress toward separating the genes that show a sign of breast cancer or AIDS.
Once these genes are found and studied, researchers can develop new ways to attack infections, and genetic diseases. Medical companies are very interested in mapping the human genome; as they expect to develop a lot of new drugs for these illnesses.
Why did the scientists work so hard at mapping the human genome？
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