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【多选题】
美国管理学者埃德加沙因指出群体的三个特征是：A.
彼此互动
B.
心理上意识到彼此的存在
C.
们认为自己是一个群体
D.
具有共同的目标与利益
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【简答题】根据《突发事件应对法》的规定，可以预警的自然灾害、事故灾难和公共卫生事件的预警级别分为四级，即一级、二级、三级和四级，对应下列颜色，其标示正确的是（ ）。
【简答题】When Elon Musk says, as he did this week, that his new priority is using artificial intelce to build domestic robots, we should not only take note, but look forward to the day we can put our legs...
【多选题】Select the following true statements regarding the concept of artificial intelligence.选择以下关于人工智能概念的正确表述。
A.
Artificial intelligence is the intelligence exhibited by machines or software. 人工智能是通过机器或软件展现的智能。
B.
Artificial intelligence aims to create intelligent machines. 人工智能旨在创造智能机器。
C.
Artificial intelligence defines itself as the study of human agents. 人工智能将其定义为人类智能体的研究。
D.
Artificial intelligence is to enable the development of computers that are able to do things normally done by human. 人工智能是为了开发一类计算机使之能够完成通常由人类所能做的事。
E.
Artificial intelligence is to study and construct agent programs that perform well in a given environment. 人工智能是研究和构建在给定环境下表现良好的智能体程序。
【单选题】我国建立健全突发事件预警制度。 可以预警的自然灾害、事故灾难和公共卫生事件的预警级别，按照突发事件发生的紧急程度、发展势态和可能造成的危害程度分为一级、二级、三级和四级，分别用( )标示，一级为最高级别。
A.
红色、橙色、黄色和蓝色
B.
红色、黄色、紫色、蓝色
C.
红色、黑色、黄色和蓝色
D.
红色、白色、黑色、灰色
【判断题】An offer can be revoked before acceptance even if it explicitly indicates that it is irrevocable, in addition to indicating a fixed time for acceptance.
A.
正确
B.
错误
【单选题】Paul makes an offer to Lynn in a letter, saying nothing about how her acceptance should be sent. Lynn indicates her acceptance in a return letter. Lynn's acceptance is effectivec
A.
when Lynn decides to accept.
B.
when Lynn sends the letter.
C.
when Paul receives the letter.
D.
in none of the above situations.
【单选题】Cindy makes an offer to Neal in a fax. Neal indicates his acceptance in a return fax. Neal's acceptance is effective
A.
when Neal decides to accept.
B.
when Neal sends the fax.
C.
when Cindy receives the fax.
D.
in none of the above situations.
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