题目内容
Jack’s train__________at 50’clock next afternoon，let’s go to see him off．
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体内酒精浓度达多少时或更高时，不得从事安全敏感工作（）
汽车在各挡下的动力因素与车速的关系曲线称为动力特性图。
Some students are enthusiastic for position in student organizations probably because__________请根据以下内容回答下面的题目 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 will be counted towards a degree. In many American universities the total work for a degree consists of thirty-six courses, each lasting for one term. A typical course consists of three classes per week for fifteen weeks; a student will probably attend four or five courses during each term while attending a u- niversity. Normally a student may expect to take four years attending two semesters each year. Of course, they can 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. Every course that the student takes will be given a grade, which is recorded and available for the student to show to their prospective employers. All this imposes a constant pressure and strain of work on students. But some students still spare their time to take part in the student affairs. Elections to positions in student organiza- tions 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 large numbers of students, the operation of the system does include a certain number of activities. A student who has held one of these positions of authority is much respected and it will be helpful to him later in his career.Normally a student would at least attend __________ classes each week.
被保险的机动车辆在以下（）情况下，交强险在下一年不可以降低费率
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