Reading Comprehension Normally a student must attend a certain number of courses in order to graduate, and each course which he attends gives him a credit which he may count towards a degree. In many American universities the total work for a degree consists of thirty-six courses each lasting for one semester. A typical course consists of three classes per week for fifteen weeks; while attending a university a student will probably attend four or five courses during each semester. Normally a student would expect to take four years attending two semesters each year. It is possible to spread the period of work for the degree over a longer period. It is also possible for a student to move between one university and another during his degree course, though this is not in fact done as a regular practice. For every course that he follows a student is given a grade, which is recorded, and the record is available for the student to show to prospective employers. All this imposes a constant pressure and strain of work, but in spite of this some students still find time for great activity in student affairs. Elections to positions in student organizations arouse much enthusiasm. The effective work of maintaining discipline is usually performed by students who advise the academic authorities. Any student who is thought to have broken the rules, for example, by cheating has to appear before a student court. With the enormous numbers of students, the operation of the system does involve a certain amount of activity. A student who has held one of these positions of authority is much respected and it will be of benefit to him later in his career.
阅读理解通常是学生必须参加一定数量才能毕业的课程，他参加的每门课程会计入他的学分。在许多美国大学，学位的总工作有三十六个课程组成，为期一学期。典型课程包括三个班，每十五周在出席一所大学的学生可能会参加四或五期间每学期的课程。通常情况下，学生希望采取四年，每年参加两个学期。这是可能的传播工作期间，在一个较长时期的程度。它也有可能在他的学位课程，学生之间的一所大学和其他移动，虽然这不是在做其实作为一个经常性的做法。对于每门课程的学生，他跟随给出了一个档次，这是记录，记录是供学生展现给潜在的雇主。这一切对一个恒定的压力和应变工作，但是，尽管如此，一些学生仍然在学生事务中找到伟大的活动时间。学生组织职位的选举引起很大的热情。有效的维持纪律的工作通常由学术权威的学生，任何人被认为作弊的规则，例如，按学生有学生法庭出庭。与学生的巨大的数字，该系统的运作，不涉及一定数额的活动。一位曾担任这些职位的权力之一的学生是非常受尊敬的，这将有利于他后来的职业生涯。
107 12 were injected into the gas/liquid dissolver 15 to form high-concentration?OH solution.
108 The dissolved?OH was injected into the liquid/liquid dissolver 6 in order to adequately
109 mix and dilute,and further pass to the gas/liquid separator 7.The residual activated
110 particles of oxygen were decomposed into O2 and H2O by the eliminator 8 and 17.With
111 this system,the harmful organisms could be rapidly killed in the course of conveying
112 ship’s ballast water.There are five sampling points of A,B,C,D and E,corresponding to
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