如图，点C为线段AB上一点，AC：CB=3：2，D、E两点分别为AC、AB的中点，若线段DE=2cm，则AB的长为（）A．8cmB．12cmC．14cmD．10cm-数学

更多内容推荐

• Workers who cannot speak good English may be at disadvantage ____ with foreign customers. A．when int
• That they would win had been predicted and _________.A．the result was suchB．such was the resultC．the
• _______________, we don’t have much spare time at the moment．A．relaxing as doing sport isB．As doing
• She was so seized by panic from H7N9 that not a bird _______________.A．did she dare to get close to
• —The singer together with her band _______ invited to the concert. Did you enjoy that party?—No, no
• 如图所示，已知B、C、D是线段AE上的点，如果AB=BC=CE，D是CE的中点，BD=3，则线段AE的长度为______．-数学
• -Did Linda see the traffic accident? -No, no sooner ______than it happened.A．had she goneB．she had g
• _____ more energy to my studies instead of to online games, I would be sitting in a comfortable offi
• 平面上有任意三点，经过其中两点画一条直线，可以画（）直线．A．1条B．2条C．3条D．1条或者3条-数学
• 已知线段AB=12cm，C是直线AB上一点，AC：BC=3：1，则线段AC长为______cm．-数学
• — Did you know any Chinese before you arrived in Beijing?— Never ________ it, actually.A．had I learn
• Only when the firefighters put off the firewhat great damage it caused.A．we had realizedB．had we rea
• ________，the football game has been decided not to be put off.A．Heavily as did it rainB．As it rained
• The door opened suddenly and ____, laughing and shouting.A．three boys coming inB．come in three boys
• 若点C是线段AB的中点，则AC=BC=______．-数学
• There is no doubt ______ you'll be warmly welcomed by people there.A．ifB．whetherC．thatD．about-高
• 如图，请按照要求回答问题：（1）数轴上的点C表示的数是______；线段AB的中点D表示的数是______；（2）线段AB的中点D与线段BC的中点E的距离DE等于多少？（3）在数轴上方有一点M，下方-
• The naughty boy had wanted to play football with the kids in the street, but his parents warned him
• __________you were coming today, I’d have met you at the railway station.A．Have I knownB．Had I known
• 陈老师从拉面的制作受到启发，设计了一个数学问题：如图，在数轴上截取从原点到1的对应点的线段AB，对折后（点A与B重合）再均匀地拉成1个单位长度的线段，这一过程称为一次操作-数学
• Hardly _______ to speak when the audience interrupted him.A．he beganB．he had begunC．had he begunD．di
• _____ for your brother, I would not have gone to see Mr. Wang. A．If it is notB．Were it notC．Had it
• 如图，点C是线段AB延长线上的一点，且M、N将线段AC分成1：3：4三部分，其中AC=85AB；（1）若MN=6cm，求AB的长．（2）若AC=24cm，求NB的长．-数学
• She is a strong-willed woman and not once _______ in to any difficulty in her life.A．she has givenB．
• ____ in the United States, St Louis has now become the 4th largest city. A．It is the 24th biggest c
• _____ English that I couldn’t follow her.A．So did fast the native speak B．So fast did the native spe
• The weather in Ningbo is rather cold in winter, especially when ____ that in my hometown.A．having co
• 如图，点B在线段AC上，AB=10cm，BC=4cm，点O是AC中点，则OA=______cm．-数学
• East of the lake__________, one of which is twice the size of the other.A．lies two villagesB．lie two
• 下列说法中正确的有______（把正确的序号填到横线上）．①延长直线AB到C；②延长射线OA到C；③延长线段OA到C；④经过两点有且只有一条线段；⑤射线是直线的一半．-数学
• Knowing office rules -- whether ______ or not -- is important, especially for young job seekers.A．wr
• —David has made great progress recently.—, and.A．So he has; so you haveB．So he has; so have youC．So
• 如图，线段AB的长为8厘米，C为线段AB上任意一点，若M为线段AC的中点，N为线段CB的中点，则线段MN的长是______．-数学
• ---It is known to all that this factory pours lots of waste water into the Changjiang River every ye
• Nowhere else in the world ________ to find this kind of fish except Brazil.A．went heB．he wentC．did h
• Every year a great number of foreign tourists pay a visit to _____ we Chinese call Heaven Lake.A．whe
• When _____ help, one often says “Thank you.” or “it’s kind of you”A．offeringB．to offerC．to be offere
• 如图，延长AB到C，使BC=3AB，M、N是BC上两点，且BM：MN=2：3，MN：NC=2：5，AC=100cm，求AB、BM、MN、NC的长．-数学
• The room, although_________ to be kept locked, was often left open.A．supposingB．supposedC．to be supp
• 图中，以点A，B，C，D，E，O为端点的线段有______条．-数学
• Only after he realized the significance of mastering two languages ______ English carefully.A．did he
• I’ve tried very hard to improve my English. But by no means _____ with my progress.A．the teacher is
• 如图，线段AB=8cm，C为AB上一点，且AC=3.2cm，又知M是AB的中点，N是AC的中点，求M、N两点间的距离．-数学
• Not until World War II ______ to use new chemical techniques to purify penicillin.A．they managedB．th
• Little _____ about her own safety, though she was in great danger herself.A．did Mary careB．Mary did
• 24. NotuntilIcompletedtheform______thathalfquestionswerenotrelevanttome.A．hadIrealizedB．Ihadrealized
• From the deep valley ______, which had my heart in my mouth.A．came a frightening soundB．a frightenin
• 下列说法正确的是（）A．两点之间的连线中，直线最短B．如果AP=BP，那么点P是线段AB的中点C．两点之间的线段叫做这两点之间的距离D．如果点P是线段AB的中点，那么AP=BP-数学
• -----I am sorry for having been so rude to you.---------That’s OK. I am sure you didn’t___________.A
• 图中有______条直线，______条射线，______条线段．-数学