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【简答题】
已知：△ABC是任意三角形． （1）如图1所示，点M、P、N分别是边AB、BC、CA的中点，求证：∠MPN=∠A． （2）如图2所示，点M、N分别在边AB、AC上，且 AM AB = 1 3 ， AN AC = 1 3 ，点P 1 、P 2 是边BC的三等分点，你认为∠MP 1 N+∠MP 2 N=∠A是否正确？请说明你的理由． （3）如图3所示，点M、N分别在边AB、AC上，且 AM AB = 1 2010 ， AN AC = 1 2010 ，点P 1 、P 2 、…、P 2009 是边BC的2010等分点，则∠MP 1 N+∠MP 2 N+…+∠MP 2009 N=______． （请直接将该小问的答案写在横线上）
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【简答题】我国证券交易所是按公司制方式组成。( )
【单选题】What does the writer say about the classified advertisements that used to be put in the papers?
A.
They used to be voluntary.
B.
They used to use display type.
C.
They were all of the same size.
D.
They were more formal.
【单选题】What does the writer say about the classified advertisements that used to be put in the papers?
A.
They used to be voluntary.
B.
They used to use display type.
C.
They were all the same size.
D.
They were more formal.
【单选题】The modern city is quite different from what it ____ some ways. A . was used to be in B . used to by C . used to be in D...
A.
． was used to be in
B.
． used to by
C.
． used to be in
D.
． was used to being in
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