With the development of economics as well as the improving life standard,more and more people possess private cars.As each coin has two sides,there are also disadvantages in such a trend.First of all,the air and noise pollution is undoubtedly going from bad to worse.The poisonous gas the private cars send out is not only of great harm to the environment around us,but to our human bodies as well,especially to the respiratory systems.Private cars,of their owners most are new drivers,meanwhile,are consequently easy to result in traffic jams or even accidents.You can imagine how worrying the situation can be when you are in a hurry!Such being the case,some immediate measures must be taken to prevent it in my opinion.For instance,we should pay more attention to the environmental protection to refresh the air,if possible,to reduce the noise level.It is expected that more advanced technology can make it a reality to replace the poisonous gas with one which both saves energy and causes no harm,thus making our daily life more satisfying
最新问答： 方程cos(x+π6)cos(x+π3)-sin(x+π6)sin(x+π3)=1在（0，π）上的解集是___． 已知函数f（x）=log1/3 （x²-2x）,求它的单调区间 重力势能、弹性势能、弹力…… 计算有理数的题!_1_+_1_+_1_+.+_____1_____ 1*3 3*5 5*7 2003*2005 在△ABC中,G是重心,AG的延长线交BC于D,过G作GF∥AC,交BC于F,则S△DGF：S△ABC= 我是大一新生,第一学期高数没学好,对微积分理解不透彻,现在大学物理运用微积分做题我不会做, 碳酸亚铜受热分解方程式RT能否如此？Cu2CO3==△==Cu2O+CO2↑ 求比较级最高级。happy,happily,harmful,healthy,helpful,hungry,hurry,h 压强,摩擦力.（2010嘉兴）小明把两支同样的粉笔竖直放置在坚硬的水平桌面上.粉笔两头横截面积不同,其中一支正放,一支倒 25x44=25x4x11=(25x4)x11,这里运用了什么律? 把“融化的雪水,从高耸的山涧、从峭壁上飞泻下来”变成比喻句 三角形周长计算不规则三角形,A长135,B长60,AB夹角85度.问C长多少? 如图,△ABC中,∠ACB=90°,CD是中线,求证AB=2CD 平行四边形ABCD中,∠B=60度,EA平分∠BAD交BC于E,AE=5厘米,EC=3厘米,平行四边形的周长是多少厘米 分离包括哪几道工序? 20．七年某班的篮球拉拉队同学,为了在明天比赛中给同学加油助威,提前制作了一面同一规格的彩旗.小明在 求证:√x²+y²>³√x³+y³如何证明?请给出步骤, 思想锋鸣是什么意思? she called__at 12:30 this afternoon. A.my B 要单飞咯的英文翻译
