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【单选题】
下面代码的执行结果为( )。
A.
20
B.
12str8
C.
8
D.
20str
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【简答题】《指南》数学教育总目标关键词包括:( )、( )、( )、( )、( )。
【单选题】What's the difference between an email conversation and a telephone conversation?
A.
There are facial and voice cues to help email conversation but there is none to help a telephone conversation.
B.
Email is an interactive conversation, but telephone conversation isnt.
C.
An email conversation does not require an immediate response, but a telephone conversation does.
D.
None of the above.