⑦制(zhi)约电(dian)(dian)(dian)(dian)动汽车发展(zhan)(zhan)(zhan)的(de)(de)(de)(de)几个(ge)瓶颈(jing)：（一(yi)）电(dian)(dian)(dian)(dian)池(chi)(chi)问题(ti)(ti)。电(dian)(dian)(dian)(dian)池(chi)(chi)组过重和充电(dian)(dian)(dian)(dian)时间过长一(yi)直制(zhi)约着(zhe)电(dian)(dian)(dian)(dian)动汽车的(de)(de)(de)(de)发展(zhan)(zhan)(zhan)。当年在(zai)工厂里(li)跑来跑去(qu)的(de)(de)(de)(de)电(dian)(dian)(dian)(dian)瓶车，铅酸蓄电(dian)(dian)(dian)(dian)池(chi)(chi)组的(de)(de)(de)(de)自重往往超过了(le)载荷量(liang)。如今，各国的(de)(de)(de)(de)电(dian)(dian)(dian)(dian)池(chi)(chi)研(yan)究(jiu)呈(cheng)加速状态。近30年里(li)，电(dian)(dian)(dian)(dian)池(chi)(chi)的(de)(de)(de)(de)能量(liang)密度在(zai)前15年里(li)提(ti)升了(le)1.8倍，而最近的(de)(de)(de)(de)15年里(li)跨越性(xing)地提(ti)升了(le)5.2倍。我国研(yan)究(jiu)人(ren)员(yuan)将锂电(dian)(dian)(dian)(dian)子(zi)电(dian)(dian)(dian)(dian)池(chi)(chi)作为(wei)(wei)主攻方向，功(gong)率密度从2002年的(de)(de)(de)(de)490W/kg发展(zhan)(zhan)(zhan)到(dao)2008年的(de)(de)(de)(de)2000W/kg，电(dian)(dian)(dian)(dian)池(chi)(chi)模块的(de)(de)(de)(de)常规循环寿命达(da)(da)(da)1000次(ci)以(yi)上，成本(ben)大大降低，可以(yi)满足电(dian)(dian)(dian)(dian)动汽车市(shi)场化要(yao)求。目前电(dian)(dian)(dian)(dian)动汽车采用的(de)(de)(de)(de)镍氢(qing)电(dian)(dian)(dian)(dian)池(chi)(chi)、锂电(dian)(dian)(dian)(dian)池(chi)(chi)或氢(qing)燃料电(dian)(dian)(dian)(dian)池(chi)(chi)普(pu)遍(bian)达(da)(da)(da)到(dao)了(le)充一(yi)次(ci)电(dian)(dian)(dian)(dian)行驶(shi)100千米以(yi)上，快速充电(dian)(dian)(dian)(dian)10—30分钟(zhong)可达(da)(da)(da)容量(liang)的(de)(de)(de)(de)80%的(de)(de)(de)(de)基(ji)本(ben)要(yao)求。虽然还(hai)在(zai)安全性(xing)、稳定性(xing)等诸方面尚(shang)有问题(ti)(ti)需要(yao)解决(jue)，但可以(yi)认(ren)(ren)为(wei)(wei)瓶颈(jing)已被突破。（二）充电(dian)(dian)(dian)(dian)站的(de)(de)(de)(de)建设问题(ti)(ti)。人(ren)们(men)普(pu)遍(bian)认(ren)(ren)为(wei)(wei)，滞(zhi)后的(de)(de)(de)(de)充电(dian)(dian)(dian)(dian)站建设拖了(le)电(dian)(dian)(dian)(dian)动汽车发展(zhan)(zhan)(zhan)的(de)(de)(de)(de)后腿。
⑧普遍认为(wei)，2010年是(shi)电(dian)(dian)动(dong)(dong)汽车(che)(che)(che)成(cheng)规模进入市场(chang)的(de)(de)(de)(de)元年。而(er)电(dian)(dian)动(dong)(dong)汽车(che)(che)(che)的(de)(de)(de)(de)进军线(xian)路(lu)图倒是(shi)比较清晰，其(qi)基本态势(shi)是(shi)各路(lu)称雄，殊(shu)途(tu)同(tong)归。当前的(de)(de)(de)(de)国际市场(chang)上，3大类电(dian)(dian)动(dong)(dong)汽车(che)(che)(che)都(dou)在明(ming)争暗斗。不过有迹象表明(ming)，技术成(cheng)熟的(de)(de)(de)(de)混(hun)合(he)动(dong)(dong)力车(che)(che)(che)和“未(wei)来(lai)之(zhi)星”的(de)(de)(de)(de)氢(qing)燃料电(dian)(dian)池车(che)(che)(che)的(de)(de)(de)(de)研(yan)发厂家(jia)同(tong)时(shi)也盯上了纯电(dian)(dian)动(dong)(dong)车(che)(che)(che)。毕竟混(hun)合(he)动(dong)(dong)力还是(shi)离不开油，而(er)燃料电(dian)(dian)池车(che)(che)(che)充氢(qing)问题一时(shi)难以解(jie)决(jue)。在我国即(ji)将(jiang)到来(lai)的(de)(de)(de)(de)电(dian)(dian)动(dong)(dong)汽车(che)(che)(che)市场(chang)，纯电(dian)(dian)动(dong)(dong)车(che)(che)(che)将(jiang)在一段时(shi)间内呈现(xian)多(duo)种技术并存、百(bai)花(hua)齐放的(de)(de)(de)(de)局面。
5.下列各项中，对原文(wen)内容的概括，不(bu)正确(que)的一项是A.第(di)①段，给电动汽车下定义。
