题干

现代无机化学对硫﹣氮化合物的研究是最为活跃的领域之一.其中如图是已经合成的最著名的硫﹣氮化合物的分子结构.下列说法正确的是(   )

A:该物质的分子式为SN

B:该物质的分子中只含共价键

C:该物质具有很高的熔、沸点

D:该物质与化合物S2N2互为同素异形体

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答案(点此获取答案解析)

B

同类题1

阅读下面短文,掌握其大意,然后从A、B、C、D四个选项中,选出可以填入空白处的最佳选项。

    One of the most important lessons I learned from my father took place in our driveway when I was in elementary school. We used to play basketball every day, and he 1that I needed to learn how to shoot and dribble with my left hand. Being naturally athletic, I quickly became frustrated with my lack of left-handed 2. I became very angry, 3 down on the driveway, and began to cry, and my father stood there and looked at me as he waited 4 for me to get over my tears. When I realize that my behavior was not getting me 5, I got back up. He passed me the 6 and I continued to practice. His lesson of 7 giving up and working harder to accomplish my goals was conveyed to me without a word. I 8 became skillful with my left hand, but what I really learned that day was a road map for overcoming my biggest 9 in life.

    10 I was eighteen I was in a car accident, where I broke a vertebra in my spine. I was going to 11 to play soccer, and now I was told that I would never again be able to 12 athletically. For half a year I was not even able to 13 my own clothes. I wanted to 14 school and give up. I wanted to lie down and cry that life was 15, much as I had done in our driveway so long ago. 16every time I felt that way, that earlier memory danced in my mind. I knew that 17 I was patient and continued to work hard, I could overcome this difficulty.

    For three years I continued to go to school, doing three to four hours of 18 rehabilitation every day, with constant support from my parents. And I finally earned my 19 back on the playing field. That lesson in the driveway had 20 me to be on the field, and I owed it all to my dad. I succeeded because of who my father is, and who I am because of him.