共找到 775 与class_____watching 相关的结果，耗时7 ms
有学生关系S和借书关系C如下图所示。它们的主码分别是S#和C# S S# NAME CLASS下列哪些操作不能进行?A．向关系S中插入('200110045'，'钱七'，'10320011')B．在关系S中删除('200110059'，'李四'，'10220011')C．向关系C中插入('56'，
A.pageB.requestC.sessionD.application
In our class, when the bell rang and the teacher closed his book, it was a___________ for everyone to stand up.A. signal B. chance C. mark D. measure
missed in class. The doctor says he is recovering fast than
The teacher is glad that everyone in her class---------(渴望的)to learn.
What surprises the girl at school?A．A lot of discussions in class.B．Teachers giving little homeworkC．Few students asking questions in class.
---- Sorry, I have to ( )now. It’s time for class.---- OK, I’ll call back later.A． hang upB． break upC． give upD． hold up
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