【正文】 x=2時，y=3（2）17/8≤x＜（3）x≤17/8x≤1/2（1）4000元（2）5種：①甲6，乙9；②甲7乙8；③甲8乙7；④甲9乙8；⑤甲10乙5（3）a=300，甲6乙9更有利四、x≤280 137/18＞x＞137/19 操作探究（1）C＞A＞B（2）R＞S＞P＞Q 創(chuàng)新舞臺當(dāng)m＞n時，不答應(yīng)；當(dāng)m=n時，無所謂；當(dāng)m＜n時，答應(yīng)。五、BD（1）a178。+ab（2）x+y（3）1（4）ac（1）36a4^4b179。（註：4^4即4的4次方，以后不解釋）（2）x（x178。9）（1）5x10y/2x40（2）x20/130x+24（1）1/3x178。=4y/12x178。y，5/12xy=5x/12x178。y（2）y/x(xy)178。=y178。xy/x(yx)179。 x/(yx)179。=x178。/x(yx)179。 創(chuàng)新舞臺7，7六、1 3x178。 46 DAC（1）2/xz179。（2）10/3a178。(a+2)操作探究 略七、（1）x=0（3）x=0（第2問呢物理 基礎(chǔ)展現(xiàn)一，單項選擇題。1—5ADDCD 6—10ADBCC 11—15DDCBB 16—20AAACD 21—25 BBDDB26—30DDDBD二，填空題。1.。物體所含物質(zhì)的多少 物理屬性 地理位置 狀態(tài) 溫度 千克 kg 2。質(zhì)量 水平偏小3?！?”刻度處 右 4。“0”刻度處 右 5。甲 分子處于永不停息的無規(guī)則運動6。運動 7。靜電 8。引力 斥力 9。斥力 溫度 10。桌子 相互 11。運動狀態(tài) 形變 方向 速度 施加力 12。壓力 接觸面粗糙程度 增大壓力 增大 減小接觸面粗糙度 減小 13。49 49 14。小于 等于 大于 15。后 摩擦力 運動 慣性 16。20 100 豎直向上17。減小 托里拆利 ^5 18,。液體壓強 壓強 19。接觸面積 壓力 減小 20。3 受到 3 探究操作1。略 2。略 3。略 4（1）平衡螺母（2）BCA（3）^3kg/m^3 5。靜止 運動運動 作用在一個物體上的兩個力，大小相同，方向相反，在同一直線時，這兩個力是平衡力。6。（1）略（2）1,2（3）在表面粗糙程度相同時，滑動摩擦力的大小與壓力大小有關(guān)7。（1）速度（2）木板（3）毛巾（4）在壓力相同的情況下，表面粗糙程度越大，滑動摩擦力越大 8。（1）木塊向左傾倒（2）木塊向右傾倒（3）木塊向右勻速運動（4）慣性 9。（1）1,4,5（2）1,2,3（3）5,6 10。第一組 評價略 第二組（1）正比（2）天平彈簧測力計（3）略（4）略 11。略 12。略 13。略創(chuàng)新展臺1。（1）摩擦力（2）（3）物體所具慣性的大?。?）略 2。英語、一、15BBACB二、governmentUnluckilywasteinterviewpresent三、since agoused to beHow long has taughtHas had yetisn39。t anything四、borrow have lentHow muchlife is better thanHave seen any exhibition recently五、略 二、一、sooutherndictionaryservicefreshfeeling二、Has beentaughtmarriedmissedwill feel三、too tohas had forHow long has liveshas arrived at since四、learn past presentturned intoan interview withhasn39。t heard from五、DDBA 三、一、ciappedspeedrestaurantsymbolexcellent二、enterenceattractionsshinyvisitting performersperformers三、different from thatto seehas been deadhas been overshow me 四has been touse to afraid harmlesshave a bird39。seye viewreturn to have kept五、BCEDA 六i 7traffic policethe hand of clockthen 四、一、educationmarkedgrammarknowledgeservice二、correctlysleepyboredintroducingwrted三、What do to doHow often dodon39。t think iseasy fast tousewas designed四、nothing wrong with connet keyboard towill bee more difficult the highergive out leaflets to raiseorganized a charity show poor areasWhy not advertise五、略 五、一、15 BBBBD二、was foundwas givenWas paintedwas toldbe prevented三、seemed thatto beRemember toto introducewas able to四、should pay attention toteenagers mobile phonewrong to look down onTo learn easy is hard isheld五、14 CABAhot dog 六、一、internationalnaturalproudblindnessgrateful二、decisionadvertisementoperationcollectionsafeness三、be finishedshall weam not usedsuch a careless girl thatto spend四、enough for medical五、keyboardmousescreenpaperprinterduringperfectexcellent 七、一、recordedblindduringperfectexcellent二、to be growsvoluntaryaskingmeaningfultraveling三、don39。t heHow funten moredon39。t need tothe only四、has been takenprovide them withgiven up this chanceteam spirit most importantnecessary for to sleep五、2 八、一、15BCDCD二、Have heardtaught has workedtalkingseeworking三、try our best toraises forfinished doingpeople in needat least四、It39。s necessary totake part insupport a lotseemeed that winwithout sleeping五、necessary to take care cross the streetduties to projectNo matter give upproud ofprovide with be greatful to六、DD 6YESNO七、略九、15 AAABD二、cinemacoveredharmlessdesignerclapping三、away sincehostedWhat usefulon ownWas bulit四、is interested in playing the pianowill make you healthylisten to the teacher carefullygo to Austrila in OctoberWhen I was fishing by the river 十、一、channelstarsclearlyluckiestwith二、lyingHave playednot to leavewill staydidn39。t三、eight years oldspent finshingcareful enoughthat is usefulWhat else四、How grateful these patients arewill be invited to take part inIn some ways getting worse and worsehas beendead for dead in rainysays to herself Don39。t be afraid so serious五、14 ABCD 十一、一、15 CADCC二、finishingthe most famous charitiesto raiseuselesscutting三、don39。t think canwithout sleepingHow long should finishold enoughRemember to四、encourages me tosopretty that can39。t stop takingnecessary for tosuch a cheap that cantry your best to in need 十二、一、heavilytendayUnluckilysucesspass二、enterencetookBeto teachgive三、is made to relaxhas been over formust be finishedsuch thatnot strong enough to skate on it四、to get along well withhow many toothbrushes hasare proud ofrealized how luckyused to talking五、6Name 10 metres 64