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【简答题】
阅读理解。 Mary is a girl.  She is a middle school student.  She is in Class Three, Grade Two. There is a big picture in Mary's bedroom It's the picture of the family.  Mary's mother is a teacher of Chinese.  There is a nice pen in the pocket of her white coat.  Mary's father is a worker.   There is a big red flower on his black coat.  He is at work from Tuesday to Sunday. Mary's brother is near her mother.  He is a middle school student, too.  He is fourteen.  He is in Grade Three. Mary and her brother like books.  They like school.  They work hard). They are good students. 1.  This is a picture of _____. A.  Mary B.  Mary' s family C.  Mary's father D.  a middle school 2.  Mary is _____. A.  fourteen B.  eleven C.  thirteen D.  fifteen 3.  Mary 's father and mother are_____. A.  worker and teacher B.  worker and nurse C.  teacher and doctor D.  doctor and nurse 4. There is a red flower on _____ coat . A.  Mary's B.  Mary's brother's C.  Mary's brother's D.  Mary's father's 5. _____ on Monday. A.  They four are all at home B.  Mary and her brother go to school C.  Only Mary's father is at home D.  Mary's mother and father are not at work
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参考答案:
举一反三
【简答题】云对安全飞行产生不利影响的原因是( )A. 影响正常的目测 B. 温度低了造成机翼表面结冰 C. 增加阻力 D. 积雨云会带来危害
【判断题】记忆就是人脑对外界信息进行编码的过程。()
A.
正确
B.
错误
【单选题】云对安全飞行产生不利影响的原因不包括()
A.
影响正常的目测
B.
温度低了造成机翼表面结冰
C.
增加阻力
D.
积雨云会带来危害
【多选题】设随机变量x服从b(n,p),则( )。
A.
分布列:P(X=x)= (1-p) n-x (x=0,1,2,…,n)
B.
E(X)=np
C.
Var(X)=np(1-p)
D.
Var(X)=np(1-p)2
E.
Var(X)=p(1-p)
【单选题】不属于云对安全飞行产生不利影响的原因是
A.
影响正常的目测
B.
温度低造成机翼表面结冰
C.
增加阻力
【单选题】设随机变量X~N(μ,81),Y~N(μ,16),记p1=P(X=μ-9),p2=P(Y=μ+4),则()
A.
p1=p2
B.
p1p2
C.
p1p2
D.
无法确定
【单选题】设随机变量X~N(μ,4 2 ),Y~N(μ,5 2 ),记p 1 =P{X≤μ-4},p 2 =P{Y≥μ+5},则(    ).
A.
p 1 =p 2 ;    
B.
p 1 <p 2 :
C.
p 1 >p 2 ;
D.
p 1 ,p 2 无法比较
【单选题】设集合P={x 1-1≤x≤3),N={x1 2≤x≤4),则P U N是 ( )
A.
{x1 2≤x≤3)
B.
{x1 2
C.
{x1-l
D.
{xl-1≤x≤4)
【判断题】每个人都有维护自身和他人健康的责任,健康的生活方式能够维护和促进自身健康。()
A.
正确
B.
错误
【判断题】设X ~ B(n1,p),Y ~ B(n2,p),则X + Y ~ B(n1 + n2,p).
A.
正确
B.
错误
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