《生物医学工程专业英语》Unit 1 Real Numbers.pptxVIP

19/4.1 ≈ 4.6;12.6/1.9 ≈ 6.6;1.62/0.46 ≈ 3.5;118/28 ≈ 4.2;学习英语的动力;课程设置;考核方法;专业英语考试安排在第一个学期结束时， 第一部分24分：单词考试，全部为填空，英汉互译； 第二部分10分：数学公式的读法，共5道题； 第三部分21分：英译汉，共7道题（7句）； 第四部分15分：汉译英，共5道题（5句）； 第五部分30分：阅读理解，四篇文章，15道选择题。 前三部分为闭卷，最后两部分为开卷。 Coursera简介: .;Unit 1 Real Numbers;algebraic;In applications of algebraic concepts, we use real numbers to represent quantities such as distance, time, speed, area, profit, loss, and temperature. Some frequently used sets of real numbers and the relationships among them are shown below. ;Numbers that can be expressed in the form p/q, where p and q are integers and q ≠ 0, are rational numbers. Decimal notation for rational numbers either terminates (ends) or repeats. Each of the following is a rational number. Notation : 记法，符号。例如scientific notation(科学记数法)；musical notation(乐谱);The real numbers that are not rational are irrational numbers. Decimal notation for irrational numbers neither terminates nor repeats. Each of the following is an irrational number. The set of all rational numbers combined with the set of all irrational numbers gives us the set of real numbers. The real numbers are modeled using a number line, as shown below.;The set of all rational numbers combined with the set of all irrational numbers gives us the set of real numbers.: “所有有理数与所有无理数的合集为实数集”，句中combined with为修饰前述名词的定语，这种后置定语（包括现在分词和其它形容词）在科技文体中极为常见，能对描述的名词作出多层次的修饰，而且可使句中简洁，例如 Markings used to convey a warning, prohibition or mandatory action mitigating a RISK not obvious to OPERATOR are safety signs from ISO 7010. 2.538 rounded to two decimals becomes 2.54. 在阅读时，遇到这种后置定语，应养成期待后续谓语的习惯，这样可提升阅读理解的速度，例如接下来Note 3中的句子。;Each point on the line represents a real number, and every real number is represented by a point on the line.;If a number a is to the left of a number b, then a is less than b (a b): 此处用了if … then …，虽然在大学英语中强调对于假设或因果关系只需用一个连词，但在某些科技文献，特别是数学类的文章中，为了强调逻辑关系，通常成对使用，还比如because … therefore…。;Lines 28-37;The statement a ≤ b, read “a is less than or equal to b,” is tr