已知$|A|=10,|B|=7,|A\cup B|=10,则|A\cap B|=$请输入具体数值:<br/>______

设$P(A)=a$，$P(B)=0.3$，$P(\bar A\cup B)=0.7$, 若随机事件$A$与$B$相互独立，则$a=$( ) A: 1/7 B: 2/7 C: 3/7 D: 4/7

I dropped the __________ and broke it． A: cup of the coffee B: cup of coffee C: cup for coffee D: coffee cup

He dropped the ________and broke it. A: cup of coffee B: coffee’s cup C: cup for coffee D: coffee cup

（2）、$A,B,C$至少两个发生 A: ${(ABC)}\cup{(\bar{A}BC)}\cup{(A\bar{B}C)}\cup{(AB\bar{C})}$ B: ${(\bar{A}BC)}\cup{(A\bar{B}C)}\cup{(AB\bar{C})}$ C: ${A}\cup{B}\cup{C}$ D: ${(\bar{A}\bar{B}\bar{C})}\cup{(\bar{A}B\bar{C})}\cup{(\bar{A}\bar{B}C)}\cup{(A\bar{B}\bar{C})}$

He dropped the _____ and broke it. A: cup of coffee B: coffee's cup C: coffee cup

____________ and broke it. A: Down fell the coffee cup B: He dropped the coffee cup C: Down was the coffee cup fallen D: The coffee cup fell down

According to the last two paragraphs, the Tottenham Hotspur ______. A: lost the Final Cup by 2-1 B: won the Final Cup by 2-2 C: lost the Final Cup by 2-3 D: won the Final Cup by 3-1

题目包含多个选项，但学生只能选择一个答案。<br/>设A,B,C表示三个随机事件，请问下列事件应如何用A,B,C表示<br/>（2）、$A,B,C$至少两个发生 A: ${(ABC)}\cup{(\bar{A}BC)}\cup{(A\bar{B}C)}\cup{(AB\bar{C})}$ B: ${(\bar{A}BC)}\cup{(A\bar{B}C)}\cup{(AB\bar{C})}$ C: ${A}\cup{B}\cup{C}$ D: ${(\bar{A}\bar{B}\bar{C})}\cup{(\bar{A}B\bar{C})}\cup{(\bar{A}\bar{B}C)}\cup{(A\bar{B}\bar{C})}$

Which of the following is NOT a form of rest according to Tip 7? A: Having a cup of tea. B: Checking email. C: Walking around. D: Discussing a problem with other people.