英语周报八年级新目标（20）答案

Li Hua第二节There was a phone number on the flyer. My dadcalled it and someone answered it was a lady. My dadasked whether she was the one who put out the flyers. Shesaid "Yes! with excitement and told us Coby, who wasvery dear to her, had been gone days before. Then we toldher that we had her puppy and we would take him to her.She told us her address at once: then we went to itWe found the lady's house, and then we knocked on ihe door. A lady opened the door, and when she saw thepuppy, she screamed with joy. We handed her the puppyfeeling proud. She wanted to give us a reward for takingcare of her puppy for her, but we said it was OK becausewe were really happy to help. So we went home tired butcontent, telling my mom the whole thing My familybecame friends with the lady, and we were all happy.

分是二氧化硅,是两种不同物质,C选项正确;氯仿是极性分子,D选项错误生素C可以防止其氧化,Vc具有还原性,BC短周期元素W、X、Y、Z的原子序数依次增大。其中X与Y可形成一种淡黄色物质P,常温下将0.05mP为过氧化钠,X原子序数溶于水,配成11.溶液,其中成一种白色的物质和故x为氧元素,Y为钠元素:2为金属元素,且乙可在的一种氧化物中燃烧W为碳元素素W、x、Y、2分别为项种黑色的物质,即Mg与CO反应生成C和M的反应,则Z为Mg正确;P为既含有离子键又含有共价键,这B正确;碳的氢化物有多种,其沸点可能高于氧的氢化物,选项C错误;D.W、X、Y三种元素形成的物质为C、0)、Na、Mg,故有离子半径C除去氯气中的氯化氢杂质应用饱和食盐水,A选项错误;酸碱中和滴定时酸液应装在酸式滴定管中,B选Na2CO2或Na2C2O2,其水溶液显碱性,选项D正确化取,再分液,C选项正确;实验室制取氨

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