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【单选题】
Miss Gorgers asked this question because she wanted to know whether._______
A.
it was easy to phone to Los Angeles
B.
her student could hear her from 75 feet away
C.
her students had grasped( 理解 )her lesson
D.
sound waves were slower than electricity
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参考答案:
举一反三
【简答题】根据短文内容判断正(T)误(F): Jim went to school to study history, but when he finished his first year, he didn't pass the exam and the teacher said to him, 'You have to leave school.' When the boy's father hear...
【单选题】为防止极板硫化,应按时进行(),定期进行。
A.
充电/放电
B.
充电/全容量放电、充电
C.
过充电/全容量放电
D.
过充电/放电
【单选题】外键约束用来强制数据的_______完整性。
A.
实体
B.
C.
参照
D.
ABC都不是
【简答题】Jim finished his homework two hours ago.
【简答题】完形填空。 Chris Jones recently finished a very unusual journey. Our reporter Mary met him at his home in south London and he told her all about the trip. Reporter: What gave you the idea to travel around ...
【单选题】外键约束用来强制数据的( )完整性。
A.
B.
实体
C.
参照
D.
用户定义
【单选题】流体在流动过程中,速度梯度主要存在于( )。
A.
缓冲层
B.
层流底层
C.
湍流核心
D.
不确定
【单选题】外键约束用来强制数据的( )完整性。
A.
B.
实体
C.
参照
D.
ABC 都可以
【简答题】表的检查约束是用来强制数据的( )完整性,表的外键约束实现的是数据的( )完整性,定义标识列的关键字是( )。
【简答题】They  all finished their homework _____Jim. 除了吉姆他们都完成作业.
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