问题
选择题
下列有关粒子结构示意图得出的结论中,正确的是( )
A.①②属于相对稳定结构
B.②③属于同种元素
C.③④⑤属于同种离子
D.①容易与④形成化合物
答案
B
题目分析: A选项是错误的叙述,②不属于相对稳定结构;B选项是正确的叙述,因为质子数相同;C选项是错误的叙述,是不同的原子和离子因为质子数不同;D选项是错误的叙述,④是相对稳定结构,故答案选择B
下列有关粒子结构示意图得出的结论中,正确的是( )
A.①②属于相对稳定结构
B.②③属于同种元素
C.③④⑤属于同种离子
D.①容易与④形成化合物
B
题目分析: A选项是错误的叙述,②不属于相对稳定结构;B选项是正确的叙述,因为质子数相同;C选项是错误的叙述,是不同的原子和离子因为质子数不同;D选项是错误的叙述,④是相对稳定结构,故答案选择B
完形填空。 | ||||
When we talk about a bad man, we like to call him a “wolf”. But is it really true that the wolf stands for devil and ugliness? Have you read the book “The Wolf Totem” by a famous writer Jiang Rong, which tells the story of the relationship between wolves and human beings? Have you ever_1_the wolves' world? If you had, you would 2 the wolves. In the book, wolves are heroes on the large grassland. They know more about 3 than humans. They can attack lambs (羔羊) without disturbing their mothers. They also know how to 4 full use of the shape of land to 5 sheep. I believe that if wolves were humans, they would be 6 experts good at fighting. The wolf is a kind of special creature that can deeply understand 7 . Each wolf serves its group with its heart and soul. A 8 wolf has little power, but a pack of wolves 9 nothing. All the wolves obey the rules. 10 they are defeated, they run away together. It is their teamwork 11 makes wolves powerful. The wolves also have great self-respect and won't 12 to anyone. The writer, who wrote the book “The Wolf Totem”, 13 stole a one-month-old baby wolf and raised it very carefully. To his 14 , he found the little wolf still wanted to go back with 15 wolves. He bit through the iron chain that limited him. The wolf was 16 and he never gave in, fighting 17 his death. The little wolf died as a glorious fighter. I was shocked by this kind of 18 : wolves are one of the most respected creatures on earth. I want everyone to look at wolves in a 19 way. They are our teachers. They show us how to survive and 20 in this not simple and dangerous world. Please honor the wolves, please honor all these heroes of nature! | ||||
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