Listen to the recording once and choose the right answers to the questions you hear.[音频]
A. It means that we shouldn't solve a problem alone.
B. It means that we should collaborate with others worldwide.
C. It means that we can make things easier by working with others.
D. It means that we can put our problem on certain websites.
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2
A. It's a useful collaborative tool.
B. It's used worldwide.
C. Most contributions to the site are scientists.
D. It relies on people adding information to it.
3
A. It was set up by an international team of scientists.
B. It is a scientific problem that scientists have been studying for almost ten years.
C. It is a game just for fun.
D. It turns scientific problems into a game.
授权批准是与投资业务活动内部控制目标中的（ ）认定最相关的控制活动。
A. 存在
B. 完整性
C. 计价和分摊
D. 权利和义务
ABC会计师事务所的注册会计师A和B负责审计甲公司2020年的财务报表，A和B注册会计师计算投资收益占利润总额的比例，并将其与2019年、2018年和2017年比较，可以识别甲公司的是()。
A. 投资收益的真实性
B. 投资收益的完整性
C. 盈利能力的稳定性
D. 投资收益正确性
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