更多“ADC0809被用作数/模转换。”相关的问题
Normally a student must attend a certain number of courses in order to graduate, and each course which he attends gives a credit which may matter toward 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 followed 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 affair. Elections to positions in student organizations arouse much enthusiasm. The effective word 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 a later career.
A．to live in a different universityB．to take a particular course in a different universityC．to live at home and drive to classesD．to get two degrees from two different universities
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冬妮娅问保尔最喜欢读的是哪本书时，他的回答是《暴风雨所诞生的》。
A . 正确
B . 错误
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在项目建设各阶段中，投资决策阶段影响工程造价的程度最高，达到( )。
A．30%～50%
B．70%～90%
C．60%～80%
D．50%～70%
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我们写作时应该尽量避免写白字。
A.清楚的 B.多余的 C.浪费的 D.错误的
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发动机运转活塞处于上止点时（）。
A.速度最大
B.加速度最小
C.往复惯性力最小
D.往复惯性力最大
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有关DNA双螺旋结构，下列哪一种不正确
A . DNA二级结构中都是由两条多核苷酸链组成B . DNA二级结构中碱基不同，相连的氢键数目也不同C . DNA二级结构中，戊糖3ˊ-OH与后面核苷酸的5ˊ-磷酸形成磷酸二酯键D . 磷酸与戊糖总是在双螺旋结构的内部E . 磷酸与戊糖组成了双螺旋的骨架
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社会主义的根本原则是（）。A．不断发展生产，增加社会财富B．扩大改革开放，增强综合国力C．实行按劳分
社会主义的根本原则是（ ）。 A．不断发展生产，增加社会财富 B．扩大改革开放，增强综合国力 C．实行按劳分配，改善人民生活 D．坚持以公有制为主体，实现共同富裕
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406.关于水平角观测数据修改说法正确的（ ）。
A . 度、分值读错可以划改B . 秒值记错可以划改C . 读数正确，记录错误时秒值可以划改D . 橡皮擦改
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10KV室内三联隔离开关可以拉合容量为500KVA的空载变压器。
A.对 B.错
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根据我国法律规定，下列哪些合同有效？( )
A．16岁的甲与他人签订的购买一辆价值100元的自行车的合同
B．乙已经下岗，但持有盖了单位公章的空白合同书，并以此与丙单位签订的买卖合同
C．丁擅自代理戊与他人签订的销售戊的汽车的合同
D．乙是某公司董事长，其超越股东会授权与银行签订的贷款合同
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My teacher speaks to me______she were my mother．
A．even though
B．if
C．even if
D．as if
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MES系统包括如下层次（）
A.技术架构层
B.数据支持层
C.执行制造层
D.协同管理层
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\t放大电路如图a所示，晶体管的输出特性如图b所示，若要使静态工作点由Q1移至Q2应使（）。\t
\tA．Rb调大
\tB．Rb调小
\tC．Rc调大
\tD．Rc调小
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