题目

下列反应属于复分解反应的是（ ） A．2NaHCO3=Na2CO3+CO2↑+H2O   B．H2+CuOCu+H2O C．AgNO3+NaCl=AgCl↓+NaNO3   D．CaO+H2O=Ca（OH）2 答案：【考点】复分解反应及其应用． 【分析】复分解反应是两种化合物相互交换成分生成两种新的化合物的反应，据此进行分析判断． 【解答】解：A、2NaHCO3=Na2CO3+CO2↑+H2O，该反应符合“一变多”的特征，属于分解反应，故选项错误． B、H2+CuOCu+H2O，该反应是一种单质和一种化合物反应生成另一种单质和另In a garden filled with bushes and grass，there appeared a white rose.Everyone who saw her spoke well of her.But the flower couldn't ______ herself，and she thought of herself as a common grass.She had no idea how ______ she was.She spent the few days of her life，until wilting(凋零)set on，without knowing that all around her were ______ by her beauty.She was not ______ about herself and slowly bowed her head.One hot，sunny day，a girl was walking through the ______，thinking about how many lovely things Mother Nature has given us, ______ she suddenly saw a white rose in a ______ part of the garden.The rose was beginning to wilt.“If the rose stays here till tomorrow it'll ______ ”，she thought，“ I'll take it home and put it in the lovely ______ .”And so she did.With all her ______，she put the wilting white rose in water，and carefully placed it by the ______.The reflection(映像) from the glass meant that，for the______ time，the rose got to see herself and what she ______ like.“Is that me？” thought the rose.Little by little her leaves began to______.When she was back to her best she looked at her reflection and saw that she was ______ a beautiful flower.She thought，“Wow! Till now I hadn't ______ who I was.How could I have been so ______ ？”The rose came to realize she had spent her days without appreciating her ______，unable to see herself，unable to______ who she really was.If you really want to know who you are，forget everything that's ______ you，and just look into your heart.1.A. hear B. see C. touch D. save2.A. poor B. weak C. pretty D. lonely3.A. surprised B. annoyed C. bothered D. encouraged4.A. careful B. worried C. confident D. crazy5.A. school B. yard C. forest D. garden6.A. when B. and C. so D. but7.A. dark B. forgotten C. dirty D. good8.A. grow B. complain C. fall D. die9.A. house B. bottle C. box D. bag10.A. strength B. heart C. love D. power11.A. bed B. window C. house D. tree12.A. first B. last C. worst D. right13.A. smelled B. sounded C. tasted D. looked14.A. sing B. drop C. cry D. rise15.A. almost B. really C. always D. never16.A. realized B. remembered C. forgot D. doubted17.A. beautiful B. nervous C. blind D. cheerful18.A. beauty B. personality C. advantage D. quality19.A. explain B. know C. accept D. guess20.A. about B. on C. with D. around