试题与答案

已知点E在△ABC所在的平面且满足AB+AC=λAE(λ≠0),则点E一定落在(

题型:选择题

题目:

已知点E在△ABC所在的平面且满足
AB
+
AC
AE
(λ≠0)
,则点E一定落在(  )
A.BC边的垂直平分线上
B.BC边的中线所在的直线上
C.BC边的高线所在的直线上
D.BC边所在的直线上

答案:

因为点E在△ABC所在的平面且满足

AB
+
AC
AE
(λ≠0)

所以,根据平行四边形法则,E一定落在这个平行四边形的起点为A的对角线上,

又平行四边形对角线互相平分,所以E一定落在BC边的中线所在的直线上,

故选B.

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题型:阅读理解
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Name of Museum
Science Museum
Place
Hangzhou
 
What’s on
Animal Hall-----the ground floor
Human and Health----the first floor
Home on earth----the second floor
Rules
1.No phones    2.No smoking
Opening hours
9:00am---5:00pm (It is closed on Mondays)
Charge(费用)
Free
Telephone
73238596
小题1:The museum is in______________.
A. Hangzhou            B. Beijing          C. Guangxi
小题2:We can go to __________ on the first floor.
A. Animal Hall           B. Human and Health   C Home on earth.
小题3:We mustn’t ___________ in the museum.
A. talk                  B. stop              C. smoke
小题4:The museum is open ______________ hours a day.
A. 8                     B. 10                C. 12
小题5:Which of the following is TRUE?
A. We can visit the museum on Mondays.
B. We don’t need to pay for the visit to the museum.
C. We can take some photos in the museum.
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