目前,世界上已合成了几百种有机超导体,TCNQ是其中之一.TCNQ的分子结构如图

题型:选择题

问题:

目前,世界上已合成了几百种有机超导体,TCNQ是其中之一.TCNQ的分子结构如图所示.下列关于TCNQ说法错误的为(  )

A.分子中所有的氮原子在同一平面内

B.属于芳香烃

C.分子式为C12H4N4

D.该物质难溶于水

考点:结构式
题型:选择题

汽车启动后经过45s,速度表的指针指在如图所示的位置,由表可知(  )

A.启动后45s内汽车的平均速度是110m/s

B.启动后45s内汽车的平均速度是110km/h

C.此时汽车的瞬时速度是110m/s

D.此时汽车的瞬时速度是110km/h

题型:选择题

I grew up in a small town. My father raised chickens and ran a construction company. I was barely 10 years old when my dad gave me the responsibility (责任) of feeding the chickens and cleaning up the stable. He believed it was important for me to have those jobs to learn responsibility. Then, when I was 22, I found a job in Natchbill at a country music club called the Natchbill Palace, I washed dishes and cooked from 4: 00 pm to 9: 00 pm and then went on stage and sang until 2:00 in the morning. It wasn’t long before I became known as a singing cook. I had been rejected so many times by record companies that it was hard not to be discouraged. One night, a woman executive (懂事) from a company named Warner Brothers Records came to hear me sing. When the show was over, we sat down and talked and after she left, I said to myself it was one more rejection. A few weeks later, my manager received a phone call — Warner Brothers wanted to sign me to a record deal. Soon after, I released my first record in June 1986. It sold over 2 million copies. My best efforts had gone into every job I’ve ever held. It was the sense of responsibility that made me feel like a man. Knowing that I had done my best filled me with pride. I still feel that way today, even though I have become a well-known singer.

小题1:Why was the writer once known as the singing cook?

A.Because he was a cook at a country-music club.

B.Because he sang for guests while he worked as a cook.

C.Because he often sang while cooking.

D.Because he liked singing better than cooking.小题2:Who first recognized his talents and helped make his career successful?

A.Wamer Brothers.

B.His manager.

C.His father.

D.A businesswoman.小题3:What made the writer proud of himself?

A.His ability to live independently.

B.His sense of responsibility in whatever he did.

C.His courage in the face of rejections.

D.His hard work in his early days.

题型:选择题

在《我用残损的手掌》这首诗歌的两部分中,作者的感情发生了怎样的变化?

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题型:选择题

1.92克铜投入一定量的浓硝酸中,铜完全溶解,生成气体颜色越来越浅,共收集到气体672 mL(标准状况),将盛有此气体的容器倒扣在水中,容器内液面上升,再通入标况下一定体积的氧气,恰好使气体完全溶于水中生成HNO3,则通入的氧气在标准状况下体积是 [ ]

A.504 mL

B.168 mL

C.336 mL

D.224 mL

题型:选择题

《大淖记事》、《受戒》的作者是()。

A.汪曾祺

B.张贤亮

C.张承志

D.莫言

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