【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
【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】安全生产是指从事生产经营活动过程中,为避免发生造成()的事故而采取相应的事故预防和控制措施,以保证从业人员的人身安全,保证生产经营活动得以顺利进行的相关活动。
【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