题目

如图，M是线段AB的中点，N是线段BC的中点，AB=8cm，BC=6cm，则线段MN=______ cm． 答案：【答案】7 cm.【解析】由线段中点的定义知AM=MB=AB=4cm，BN=NC=BC=3cm．然后结合图示中的“MN=MB+BN”来求线段MN的长度．解：∵M是线段AB的中点，AB=8cm，∴MB=AB=4cm；∵N是线段BC的中点，BC=6cm，∴BN=NC=BC=3cm；∴MN=MB+BN=4+3=7cm．故答案为7．根据首字母或者中英文提示，用正确形式填空。【小题1】There is a bag in the hall. It must          (属于) to Cathy.【小题2】Jack               (更喜欢) the music that has great lyrics.【小题3】She        (梦到)that one day she would be famous.【小题4】Bill Gates donated m           of dollars in 2010.【小题5】The dog’s d           makes me very sad.【小题6】To be honest, I only eat food that t__________ good.【小题7】Finally, she made a               (decide) to teach in the poor village.【小题8】Through the Internet, we can           (easy) get the information that we need.【小题9】Our teachers often tells us the             (important) of learning how to learn.