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问题 选择题

下列物质中，不能发生消去反应的是

               B. CH3CH2Br

           D.CH2ClCH2CH3

答案

答案：C

考查卤代烃的消去反应规律

只有一个碳原子的卤代烃不能发生消去反应，卤原子所连碳原子的邻位碳原子上没有氢原子时也不能发生消去反应，故答案为C

单项选择题

两种或两种以上化学毒物作用于机体表现出独立作用，主要是由于（）

A.化学毒物各自作用的受体、靶不同，出现各自不同的毒效应

B.化学毒物在化学结构上为同系物

C.化学毒物毒作用的靶器官相同

D.化学毒物在对机体毒作用方面存在竞争作用

E.以上都对
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单项选择题

Louis Armp had two famous nicknames. Some people called him Bagamo. They said his mouth looked like a large bag. Musicians often called him Pops, as a sign of respect for his influence on the world of music.
Born in 1901 in New Orleans, he grew up poor, but lived among great musicians. Jazz had been invented in the city a few years before his birth. Armp often said, "Jazz and I grew up together. "
Armp showed a great talent for music when he was taught to play the comet at a boy’s home. In his late teens, Armp began to live the life of a musician, lie played in parades, clubs, and on the steamboats that traveled on the Mississippi River. At that time, New Orleans was famous for the new music of jazz and was home to many great musicians. Armp learned from the older musicians and soon became respected as their equal.
In 1922 he went to Chicago. There, the tale of Louis Armp began. From then until the end of his life, Armp was celebrated and loved wherever he went. Armp had no equal when it came to playing the American popular song.
His cornet playing had a deep humanity and warmth that caused many listeners to say, "Listening to Pops just makes you feel good all over. " He was the father of the jazz style and also one of the best known and most admired people in the world. His death, on July 6th 1971,was headline news around the world.

Which statement about Armp is true

A．His tale began in New Orleans.
B．He had been born before jazz was invented.
C．His music was popular with his listeners.
D．He learned popular music at a boy’s home.
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