题目

下列说法中，不正确的是A. 金属晶体中一定含有金属键B. 在含有阳离子的化合物的晶体中，一定含有阴离子C. 含有金属元素的离子不一定是阳离子D. 金属晶体中原子的堆积方式都是A3或A1型最密堆积 答案：【答案】D【解析】金属晶体中一定含有金属键；金属晶体中只含有阳离子而没有阴离子，但对离子化合物来说，含有阳离子必定含有阴离子；含有金属元素的离子不一定是阳离子，如MnO4-或[Al(OH)4]－等；金属晶体中也存在非最密堆积型式，如A2型密堆积。故D错误；本题答案为D。I guess you can say I’m not healthy. I throw up almost everything I , and I have no idea what is going on with my body in the of doing it. I’m 17 years old, and I have been suffering from this for about 6 months. That doesn’t seem like a time, but those 6 months feel like 6 years. I was never or even close to it. I’ve always been short and in shape, but it me every time to see a really pretty girl because I think, “Why can’t I like that?” Also, the town I live in is full of drugs, , and drinking , and I’ve fallen into all of those. I’m tired of the that I have been living. My parents are in me and practically think I’m a failure. I’m always worried if my trousers are going to me the next day. And on top of that, I’m friends because they think I’ve changed.Bulimia（暴食症） is a black hole that, you have entered, it is extremely hard to get out. And if you do get out, you are so .I hope that someday I can say I’ve from this terrible thing, because all I want to do is to live my life and not to have to my weight all the time. At the point I’m going, I might end up in the , and that is what frightens me most. All I can do is to try and get the I need. However, I know the best help comes from my heart and the actual need within me to this illness. 1. A. remember B. see C. read D. eat2. A. experiment B. purpose C. process D. plan3.A. accident B. illness C. loss D. punishment4.A. free B. meaningful C. bad D. long 5.A. fat B. rude C. sick D. wrong 6.A. shocks B. kills C. excites D. encourages 7. A. always B. sometimes C. also D. even 8. A. feel B. look C. sound D. taste9. A. parties B. matches C. lessons D. lectures 10. A. dream B. belief C. life D. food 11.A. pleased B. honest C. interested D. disappointed 12.A. carry B. support C. fit D. attack13.A. blaming B. losing C. visiting D. making 14.A. once B. although C. unless D. because15.A. friendly B. lovely C. busy D. lucky16.A. suffered B. returned C. recovered D. separated 17.A. add to B. worry about C. talk about D. depend on 18.A. hospital B. school C. house D. station19. A. education B. space C. help D. money 20.A. catch B. spread C. forget D. stop