Nowadays cellphones are more and more popular with students.Because they can do many things on them.First they can listen to some beautiful songs or watch films .Second they can communicate with their friends and families anywhere and any time .Third they can play games on them freely.But some students spend too much time on cellphones ,which affect their study .So in my opinion we should make good use of our cellphones .And we should not spend too much time on them .And we should see them our tools but not toys .
最新问答: 跑步摩擦力大好还是小好 硫酸钠的抑制浓度是多少?我想做一个含硫酸钠废水的处理工程,请问硫酸钠对生物的抑制浓度是多少? 饮酒中表达悠闲恬静心境的诗句是 My weekends.作文,不少于8句! 河用英文怎么写 pass 第三人称单数形式 5-512−712=5−(512+712)运用了( ) 一个晴朗的日子,一支科考队正在冰天雪地里准备生火做饭,当他们堆好干柴后发现他们都忘记带火种了,他们该怎么办?额..我知道 (2005•常州)现有H2S、S、M、SO3四种物质,是按硫元素的化台价由低到高排列的,其中M这种物质的化学式可以是( 徐志摩诗歌关于一棵树 为什么这句话中的because和so 连用呢? 运动图像位移变加速运动的v-t图像横轴与纵轴围成的面积等于位移吗 已知圆锥的底面半径长为5,侧面展开后所得的扇形的圆心角为120°,则该圆锥的母线长等于______. 五年级上册的应用题80道(简单的)、口算100道都要带答案.在寒假结束之前必答哦! (2011•昌平区一模)如图,已知线段AC与BD相交于点O,连接AB、DC,E为OB的中点,F为OC的中点,连接EF.若 把6.7.8.9.10.11.12.13.14.填在方格里使三个数相加都相等 若x的m次方=5,x的n次方=3,则x的2m-n次方= look at the student seriously对吗? 7、将1 mol气体A和1 mol气体B通入一体积不变的密闭容器中,在一定条件下发生如下反应:2A(g) + B(g)2 凡事论则皆不可为,