题目

工业上生产电路板及处理废液的工艺流程如图： （1）操作a是                    ． （2）步骤②加入过量铁粉，除能与废液中的FeCl3反应外，还可发生反应的化学方程式为                                ． （3）步骤③加入稀盐酸，充分搅拌，当观察到             现象时，说明滤渣只剩铜．步骤③发生的化学方程式为                         ． （4）步骤②③所得FeCl2可与一种单质发生化合反应，生成可循Born in America, I spoke English, not Chinese, the language of my ancestors. When I was three, my parents flashed cards with Chinese  21  at my face, but I pushed them  22  . My mom believed I would learn  23  I was ready. But the  24  never came.On a Chinese New Year’s Eve, my uncle spoke to me in Chinese, but all I could do was 25 at him, confused, scratching my head. “Still can’t speak Chinese?” He  26  me , “You can’t even buy a fish in Chinatown .” “Hey, this is America, not China. I’ll get some   27  with or without Chinese.” I replied and turned to my mom for  28  .“Remember to ask for fresh fish, Xin Xian Yu,” she said, handing over a $20 bill. I  29  the words, running downstairs into the streets of Chinatown.I found the fish  30  surrounded in a sea of customers. “I’d like to buy some fresh fish,” I shouted to the fisherman. But he  31  my English words and turned to serve the next customer. The laugh of the people behind increased  32  their impatience. With every  33  ,the breath of the dragons on my back grew stronger—my blood boiling—  34  me to cry out. “ Xian Sheng Yu, please.” “Very Xian Shen ,” I repeated. The crowd erupted into laughter. My face turned  35  and I ran back home  36  , except for the $20 bill I held tightly in my pocket.Should I laugh or cry? They’re Chinese. I should feel right at  37  . Instead, I was the joke , a disgrace (丢脸)to the language.Sometimes, I laugh at my fish  38  , but, in the end, the joke is on  39  . Every laugh is a culture  40  ; every laugh is my heritage (传统) fading away.【小题1】A．customB．gamesC．charactersD．language【小题2】A．aheadB．aroundC．alongD．aside【小题3】A．whenB．beforeC．unlessD．until【小题4】A．success B．studyC．time D．attempt【小题5】A．aim B．joke C．nodD．stare【小题6】A．cared about B．laughed atC．argued withD．asked after【小题7】A．right nowB．from now C．at times D．in time【小题8】A．decisionB．permissionC．informationD．preparation【小题9】A．repeatedB．reviewed C．spelledD．kept【小题10】A．farmB．standC．pond D．market【小题11】A．guessedB．forgetC．doubtedD．ignored[来【小题12】A．byB．asC．with D．from【小题13】A．secondB．effortC．desireD．movement【小题14】A．forcing B．allowing C．persuadingD．leading【小题15】A．brightB．blankC．pale D．red【小题16】A．open-mouthedB．tongue-tiedC．empty-handedD．broken-hearted【小题17】A．service B．home C．risk D．root【小题18】A．tradeB．deed C．challengeD．incident【小题19】A．itB．usC．meD．them【小题20】A．thrownB．lost C．dividedD．reflected