题干

如图所示,在平行四边形ABCD中,M,N分别是AO,OC的中点,

求证:DN=BM.(用最简便的方法证明)

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答案(点此获取答案解析)

证明:在▱ABCD中有,OD=OB,OC=OA,
∵M,N分别是AO,OC的中点,
∴OM=ON=
1
2
AO.
∴四边形DMBN为平行四边形(对角线互相平分的四边形是平行四边形).
∴DN=BM.

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阅读下面两首诗词,然后回答问题。
                                                                                                   滁州西涧
                                                                                                                韦应物
                                                                                独怜幽草涧边生,上有黄鹂深树鸣。
                                                                                春潮带雨晚来急,野渡无人舟自横。
                                                                                        为陈同甫赋壮词以寄之
                                                                                                                    辛弃疾
                                                                                       醉里挑灯看剑,梦回吹角连营。
                                                                            八百里分麾下炙,五十弦翻塞外声,沙场秋点兵。
                                                                                    马作的卢飞快,弓如霹雳弦惊。
                                                                           了却君王天下事,赢得生前身后名。可怜白发生!
①对上面两首诗词中加点的词语,解释不正确的一项是(   )
A.幽草:幽深地方的草丛。
B.野渡:野外的渡口。
C.沙场:平旷的沙丘。
D.天下事:指收复中原统一天下的大业。
②《破阵子》中“五十弦翻塞外声”一句的意思是:                          
                                                                      ③判断下面对这两首诗词分析的正误,正确的打“√”,错误的打“×”。
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B.《滁州西涧》在看似平常、平静的写景中,不动声色地蕴藉自己的心迹,这是本诗的高妙之处。(   )
C.《破阵子》首句“醉里挑灯看剑”形象地显示出作者杀敌的壮志。(   )
D.《破阵子》中“可怜白发生”一句既写出了作者对自己的爱恋,也表达出壮志难酬的沉痛。(   )

同类题3

根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    Health is the most important thing in the world. Nothing is more important than health.If we take away our money,houses,or even our clothes,we can still survive.____ That is why we always try to eat in a healthy way and exercise regularly.

    How can we keep healthy?In order to eat healthily,I usually avoid eating food high in fat,like French fries or cookies,which are junk food.____ I eat a lot of vegetables and fresh fruit which are full of vitamins.

    ____ Taking exercise every day helps us build a strong body.Regular exercise is an important part of keeping me healthy.

    What's more,I think friends are an important part of one's health.____ I always feel better when I am with friends than I am alone.When I am with friends,I always laugh.Laughing is also an important part of health.It's good to stay with my friends.

    By eating properly and exercising regularly,I can keep my mind as well as my body happy.These things sound easy to do,but not many people can manage them.____

A.In addition,doing exercise is very important.

B.There are some people who like staying alone,but they keep healthy.

C.Many studies show that people with a wide range of social contacts don't get sick.

D.But if our health was taken away,it is certain that we would surely die.

E.I think a strong will is necessary if we want to keep healthy.

F.I only eat little meat.

G.Some people appear fat because they often eat too much.