题目

某地区由于经常降酸雨，导致金属被腐蚀、土壤酸化等现象．请回答下列问题： （1）在一次降雨的过程中，李明同学在不同时间段内两次采集了雨水水样，将其分别编号为①、②．用PH计（测PH的仪器）测得PH依次为4.85、4.92，将两次雨水水样相比较，酸性较强的是 ①（填编号）． （2）为改良该地区酸性土壤，应加入的一种碱是 ． （3）写出形成酸雨的一种气体 ，请写出一条防治酸雨的措施 ．完形填空阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项，并在答题卡上将该项涂黑。I was coming back from home late at night in a‘Sharing’mini van(厢式货车)．In Hydera- bad，India，it is a cheap and quick form of ．The van driver picked up as many as 13 people at times in a vehicle which is for the transport of 8．So our van was very ．Making her way to the f the van，a school girl with a bag the driver to stop．While getting down，she slipped and fell．None of us it，as it was dark outside．The driver was for her to pay．It was then that we saw that the girl was on her by the side of the road．Another passenger and l got down and held her up．Even in ，she held up a note and asked us to pay the driver．The other passenger took the note and paid the driver．My was a few hundred meters away．As a girl， I knew I’d get off and stay with her in the ．So I paid up the driver for and he drove away with the other passengers．I neither her nor did I know what to do．But I was there，giving some words to another girl in pain. I asked her to stand for a few while．I then looked for a place for her to sit．Then I 58 her friend and waited there．She was rushed to a nearby clinic later．Before leaving，she thanked me for and we hugged goodbye．The night breezes were blowing upon my cheek as I walked home，with a feeling of relief．1.A．1ife B．transport C．activity D．communication2.A．designed B．bought C．organized D．powered3.A．heavy B．noisy C．crowded D．awkward4.A．driver B．window C．door D．seat5.A．guided B．suggested C．admitted D．signaled6.A．noticed B．managed C．recognized D．stood7.A．caring B．reaching C．waiting D．planning8.A．back B．knees C．feet D．own9.A．immediately B．doubtfully C．naturally D．anxiously10.A．silence B．surprise C．vain D．pain11.A．patient B．helpful C．generous D．secret12.A．home B．stop C．car D．school13.A．dark B．rain C．wind D．van14.A．himself B．herself C．myself D．itself15.A．ignored B．persuaded C．promised D．knew16.A．anxious B．sorrow C．comforting D．satisfying17.A．up B．straight C．still D．out18.A．found B．phoned C．brought D．saw19.A．company B．support C．bravery D．convenience20.A．hard B．happily C．willingly D．gently