主运动是通过电动机驱动V带,把运动输入到主轴箱,经主轴箱内的()机构变速后,由主轴、

题型:单项选择题

问题:

主运动是通过电动机驱动V带,把运动输入到主轴箱,经主轴箱内的()机构变速后,由主轴、卡盘带动工件旋转。

A.减速

B.加速

C.变速

D.齿轮

考点:数控车工考试高级数控车工高级数控车工题库
题型:单项选择题

将同一品种的豌豆分别种在不同的田里,结果一块田里结出的豌豆粒较小,对这种差异下列描述最准确的是[ ]

A.由于遗传物质引起的,可遗传的变异  

B.由于环境条件引起的,不遗传的变异  

C.是遗传的结果      

D.是变异的结果

题型:单项选择题

_____ do you call your mother's sister in English? [     ]

A. How

B. When

C. Why

D. What

题型:单项选择题

公民享有姓名权,有权决定、使用和依法()自己姓名,禁止他人干涉、盗用、假冒。

题型:单项选择题

什么叫膀胱三角?有何意义?

题型:单项选择题

Louis Armp had two famous nicknames (绰号). 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(影响) on the world of music.

Born in 1901 in New Orleans, he grew up poor, but lived among great musicians. Jazz was invented in the city a few years before his birth. Armp often said," Jazz and I grew up together. "

Armp showed a great talent(天赋) for music when he was taught to play the cornet(短号) at a boy’s home. In his late teens, Armp began to live the life of a musician. He played in parades, clubs, and on the steamboats that travelled 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(仁爱) 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(风格) and also one of the best-known and most-admired people in the world. His death, on July 6,1971, was headline news around the world.

Which statement about Armp is true()

A.His tale began in New Orleans.

B.He was born before jazz was invented.

C.His music was popular with his listeners.

D.He learned popular music at a boy’s hom

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