【单选题】Which of the following statements is NOT true?
A.
Elephants can be graceful.
B.
Tigers are too dangerous to be trained.
C.
Animals which are natural enemies can be trained to live together.
D.
Animals can become interested in their tricks.
【单选题】三相交流异步电动机的额定功率是指( )。
【单选题】设A、B为两个事件,且已知概率P(B)=0.84,P( B)=0.21,则概率P(AB)=
【单选题】'Either put it to the test yourself... 'in Paragraph (11) means ______.
A.
to experience the hopefulness
C.
to offer someone a lift
【简答题】在数据库的三级模式中,视图属于外模式,表属于( )
【单选题】教学目标的功能有
A.
教学目标可以提供分析教材和设计教学活动的依据;
B.
教学目标描述具体的行为表现,能为教学评价提供科学依据;
【单选题】设事件A,B为两个事件,且已知概率P(A)=3/5,P(A+B)=7/10,若事件A,B相互独立,则概率P(B)为
【单选题】All of the following are mentioned as evidence that elephants can recognize their own reflection EXCEPT:
A.
They do not try to engage their reflection in social behavior.
B.
They will use their reflection to help them clean themselves.
C.
They attempt to rub their trunks against their reflection in greeting.
D.
They will explore their reflection to see what they look lik