题目内容
(请给出正确答案)
[主观题]
To get an idea of the main debates on a research topic.
提问人:网友mikeymouse1
发布时间:2022-01-07
A、They are used to express only thoughts and feelings.
B、They are signs.
C、They are simply sounds.
D、They can only be written.
E、They can only be read.
F、They can make trade.
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