题目

由碳原子构成的纳米碳管可以作为储存氢气的优良容器,其单层部分结构示意图如图所示,下列说法正确的是（   ） A.纳米碳管是一种无机化合物 B.纳米碳管中碳原子间以共价键结合 C.纳米碳管与石墨互为同位素 D.0.12 g纳米碳管中含有6.02×l022个碳原子 答案：答案:B 解析：纳米碳管是由碳原子构成的,是碳的单质,A错;碳元素是非金属元素,原子间只能以共价键结合,B正确;纳米碳管与石墨都是碳元素的单质,两者互为同素异形体,C错;0.12 g 纳米碳管中碳原子物质的量为=0.01 mol,含有的碳原子个数为6.02×1021,D错。 Owen Howkins was born with a very unusual illness. According to Owen's father, Will Howkins, at present there are only around 30 people in the world with the illness. Owen always needs a wheelchair to get around. Not surprisingly, people are always looking at him, and that used to make the young boy nervous and uncomfortable. Owen became lonely and even stopped going outside his house. That, however，was all before a dog named Haatchi came into his life！Haatchi had a very difficult start in life too. When he was just five months old，the dog was hit by a train. His tail and a leg were hurt so badly that both had to be cut off. Luckily，his story was posted online and was seen by Owen's father and mother. They fell in love with Haatchi and decided to keep him，thinking that they were helping him. In fact，it was Haatchi who helped them. By always staying with Owen，he became the boy's best friend. Slowly，Owen liked going out. Now he proudly walks around the neighborhood，showing off his dog and telling anyone Haatchi's story. Haatchi's influence on the young boy is great. In October 2012，the International Fund for Animal Welfare gave Haatchi a special award（奖），The amazing friendship between the two has been shown in a short film called "A Boy and His Dog". It has not only won several awards，but also been watched by millions of people. British writer Wendy Holden has also written their story in a heart-warming children's book.1.Owen stopped going out of his house because_______________.A.his wheelchair didn't work well B.he disliked always being looked atC.his father was too busy to take him outside D.he felt uncomfortable to see the 30 sick people2.Both Haatchi and Owen_______________.A.had a hard start in life B.was hit by a trainC.found a five-month old boy D.fell in love with their neighbor3.Which of the following is TRUE about "A Boy and His Dog"?A.It is a popular film. B.It made several children rich.C.It was created by Owen's father. D.It got special help for millions of people.4.What is the best title of the passage?A.A Kind Family. B.A Brave Dog.C.An Unusual Illness. D.A Special Friendship.