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【简答题】
语句“echo substr('itcast',3);”的输出结果是字符串:( ) 语句“echo substr('itcast',3,2);”的输出结果是字符串:( ) 语句“echo substr('itcast',2,-1);”的输出结果是字符串:( )
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反馈参考答案：
举一反三
【简答题】等差数列的前n项和公式(两种)?
【简答题】任务型阅读。 Many North Americans love sport. This does not necessarily mean that they get any exercise. What they do is watch national teams on television. They watch baseball, football, basketball, hockey...
【简答题】等差数列前n项和公式: 等差数列 的前n项 的和 有两种求解方法: 或 ,其中d是公差,n是项数。
【简答题】The boss said that the decision______ (make) in half an hour.
【简答题】交流电不断变化方向,使得变压器内部产生_______,生成______使变压器能够工作。
【单选题】_____ the boss said at the meeting disappointed everyone.
A.
Which
B.
When
C.
What
D.
That
【简答题】This watch does not seem to work, I think it needs ______(repair)
【单选题】The engineer is not happy with the project, and ______ is her boss.
A.
neither
B.
so
C.
either
D.
as
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