题目：
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The Pecan Thief When I was six years old, I was visiting my grandfather' s farm in Kansas.Grandpa had sent me into the 1 to gather pecans for us to enjoy later. Pecan picking was really 2 work and my little basket was only half full.I wasn' t about to 3 Grandpa down.Just then something caught my 4 .A large brown squirrel was a few feet away.I watched as he picked up a pecan, hurried to a tree and 5 in a large hole in the trunk.A moment later the squirrel 6 out and climbed down to the ground to pick up another nut.Once again, he took the pecan back to his hiding place. Not so 7 anymore, I thought.I dashed over to the tree and looked into the hole.It was 8 with pecans!Golden pecans were right there for taking.This was my 9 . Handful by handful, I scooped all of those pecans into my basket.Now it was full! I was so_10_of myself.I couldn' t wait to show Grandpa all the pecans. 11 , I ran back and shouted, "Look at all the pecans!" He looked into the basket and said, "Well, well, how did you find so many?" I told him how I' d 12 the squirrel and taken the pecans from his hiding place. Grandpa congratulated me on how smart I' d been in observing the squirrel and his habits.Then he did something that__13__me.He handed the basket back to me and put his arm gently__14__my shoulders. "That squirrel worked very hard to gather his winter__15__of food, " he said."Now that all of his pecans are gone, don' t you think that little squirrel will__16__the cold winter?" "I didn't think about that, " I said. "I know, " Grandpa said."But a good man should never take__17__of someone else' s hard work." Suddenly I felt a bit__18__.The image of the starving squirrel wouldn't__19__my mind.There was only one thing I could do.I carried the basket back to the tree and poured all the nuts into the hole. I didn't eat any pecans that night, but I had something much more filling-the __20__of knowing I had done just the right thing. | ||||
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答案：D题目分析：A. SO2+H2O =H2SO3.再通入Cl2发生反应：H2SO3+ Cl2+H2O =H2SO4+2HCl；H2SO4+ BaCl2= BaSO4↓+2HCl。正确。B. NO2+H2O =HNO3+NO;2HNO3+3SO2+2H2O =3H2SO4+2NO↑; H2SO4+ BaCl2= BaSO...
