目前人类已发现的非金属元素除稀有气体外共有16种，下列是对这16种非金属元素的相关判断：①都是主族元素，最外层电子数都大于4；②单质在反应中都只能作氧化剂；③氢化物常温下都是气态，所以又都叫气态氢化物；④单质形成的晶体都为分子晶体；⑤氧化物常温下都可以与水反应生成酸．正确的是（ ）
A．只有①②正确
B．只有①③正确
C．只有④正确
D．①②③④⑤均不正确
答案：D
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| One Sunday, a picture in the newspaper touched me. A young woman stood in front of a totally destroyed home. A little boy stood beside her with his head 1 . Holding her skirt tightly was a tiny girl, eyes wide with 2 and fear. With growing 3 I noticed thatitheir sizes of each family member closely 4 ours. This would be a good opportunity to 5 my children, so I explained their difficult 6 to my seven-year-old twins, and to three-year- old Meghan. "We have so much, and these poor people now have nothing." I said. "We'll 7 what we have with them." I brought three large boxes and placed them on the living room floor. Meghan watched seriously, 8 the boys and I filled one box with canned food. While I 9 our clothes, I encouraged the boys to go through their toys and 10 some of their less favorite things. Meghan watched 11 as the boys piled up useless toys in the box. "I'll help you find something for the little girl." I said to her. The boys placed the toys they had 12 to donate into one of the boxes while I filled the third box with clothes. Meghan walked up with Lucy, her worn, faded, much-loved doll 13 tightly to her chest. She 14 in front of the box, pressed her little face into Lucy's face, gave her a 15 kiss, then laid her gently on top of the other toys. "Oh, honey," I said. "You 16 to give away Lucy. You love her so much." Meghan nodded, eyes shining with tears. "Lucy makes me happy, Mommy. 17 she'll make that little girl happy, too." I stared at Meghan for a long moment, 18 how I could teach the boys the lesson she had just taught me. It's easy to give what we don't want any more, but 19 to let go of things we cherish, isn't it? 20 , the true spirit of giving is to give with your heart. | ||||
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