根据听到的内容,回答问题 What is the purpose of the woman‘ s talk? 查看材料
A.
Encouraging people to ask questions.
B.
Giving an introduction to her speech.
C.
Discussing problems in learning.
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【单选题】_____we are not attacked by nuclear weapons, we promise that under no circumstances _____ use the bomb first but we reserve the right to use it for counter-attack when necessary. [ ]