【单选题】--I hear you __________ your project at the end of last week. --In fact, I __________ it by the end of last month. [ ]
A.
had finished; had finished
B.
finished; had finished
C.
had finished; finished
【单选题】行星架的转速 n H =0时的齿轮3的转速 n 3 为(大小及方向):
【单选题】In Anthony O'hear's view, a well-mannered person ______.
A.
acts rashly when he is young
B.
tends to be bad-tempered in old age
C.
behaves with a sense of appropriacy
D.
attaches importance to his status
【判断题】只有雄性的动物原麝、林麝、马麝才能产生麝香。
【单选题】1922年,华盛顿会议签订的哪一条约,实际上为美国在中国的扩张提供了有利条件( )
【单选题】In Anthony O' Hear' s view, a well mannered person
A.
acts rashly when he is young
B.
tends to be bad-tempered in old age
C.
behaves with a sense of appropriacy
D.
attaches importance to his status
【简答题】数据库技术产生年代? 2、数据库技术广泛应用和普及的年代? 3、什么是数据处理?什么是数据管理? 4、Data、DB、DBMS、DDL/DML、DBS、DBA这些缩写分别代表什么,各自的含义是什么?