判断题

ES线是奥氏体在冷却过程中析出铁素体的开始线，又称为Acm线。
正确错误

答案：错误

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单项选择题

9. (1) Since ancient, every great achievement our task has done by teamwork instead of doing by a single one. (2) No matter how advanced the technical is, it is impossible for human beings to work or live alone. (3) Therefore, working from home is unreasonable.
判断：句（2）切题。
A、正确
B、错误

不定项选择

持有股票的同时买入看跌期权的策略被称为收益增加策略

A．正确
B．错误