在线作业 第2520页

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《信息系统分析与设计》第二套作业（第四单元~第六单元） 1.[单选题]用来定义一个用例的输入和输出的模型是( )。 A.用例图 B.活动图 C.数据流图 D.系统顺序图 答:——D—— 2.[单选题]( )在系统边界之外的个人或组织，它提供...

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《信息系统分析与设计》第三套作业（第七单元~第九单元） 1.[单选题]( )是对一个类中功能一致性的定性度量。 A.聚合 B.耦合 C.组合 D.集合 答:——A—— 2.[单选题]数据存储在数据库中的域对象通常是( )。   A...

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21春《大学英语（二）》作业_4 1.[单选题] For___of accidents, he drives slowly. A.dread B.fear C.terror D.alarm 答:——B—— 2.[单选题] After a c...

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21春《大学英语（二）》作业_3 1.[单选题] Color flags and balloons ___ the attraction of the festival. A.put on B.added to C.put for D.ad...

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21春《大学英语（三）》练习_4 1.[单选题] _______ my return, I learned that Professor Smith had been at the Museum and would not be back ...

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21春《大学英语（三）》练习_3 1.[单选题] Nancy is________ girl. A.a eighteen-year-old B.an eighteen-years-old C.a eighteen-years-old D.a...

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21春《大学英语（三）》练习_2 1.[单选题] They decided to chase the cow away ___ it did more damage. A.unless B.until C.before D.after 答:...

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21春《大学英语（三）》练习_1 1.[单选题] I was advised to arrange for insurance _______ I needed medical treatment. A.so that B. in case...

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21春《大学英语（一）》作业_4 1.[单选题] Fujian lies in ____ east of China, I’m thinking of going _____ east. A.the, the B./, / C. the, ...

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21春《大学英语（一）》作业_3 1.[单选题] If I were you I ___ accept the invitation. A.will B. would C. may D. should 答:——B—— 2.[单选题] The...

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21春《大学英语（一）》作业_2 1.[单选题] The newspaper ___ the rain will last for another three days. A.is being said B.says C.is said D...

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21春《大学英语（一）》作业_1 1.[单选题] He is good at English, ______we all know. A.that B. as C.whom D.what 答:——B—— 2.[单选题] Not only I...