16. Obviously, there would be no point in investing in a computer if you had to check all its answers, but people should also rely on their own internal computers and check the machine when they have the feeling that something has gone wrong.
17. Certainly Newton considered some theoretical aspects of it in his writings, but he was reluctant to go to sea to further his work.
18. For most people the sea was remote, and with the exception of early intercontinental travellers or others who earned a living from the sea, there was little reason to ask many questions about it , let alone to ask what lay beneath the surface.
19. The first time that the question What is at the bottom of the oceans? had to be answered with any commercial consequence was when the laying of a telegraph cable from Europe to America was proposed.
20. At the early attempts, the cable failed and when it was taken out for repairs it was found to be covered in living growths, a fact which defied contemporary scientific opinion that there was no life in the deeper parts of the sea.
为了帮助考生提高阅读能力,整理了以下六级阅读难点关键句
第一部分
1、系好安全带能够挽救性命,它能将丧生和重伤的概率减少一半以上。
2、但是司机有责任确保14岁以下的孩子不要坐在前排,除非他们系好了安全带。
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