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【简答题】
In March 1963, an unknown pop group from the British city of Liverpool made it to number one in the charts( 排行榜 ) with a song Please Please Me . These four young men were just doing what they wanted to do -- play music and, not work. They changed pop music by singing about the least understood emotion -- love. Originally, The Beatles started with John Lennon, Paul McCartney and George Harrison. It was only when they were already performing as The Beatles in 1962 that Ringo Starr joined. Ringo took the place of Pete Best as drummer when the group were performing at The Cavern -- a famous Liverpool club in a 19th-century building. The reaction of the crowd was not positive. “We want Pete,” the fans cried out when Ringo started to play. He was soon to feel welcome, though, when less than three months later, in December 1962, the group’s first hit record, Love Me Do , got into the charts. Just three months after that, Please Please Me reached number one. It was followed by many other hits and suddenly The Beatles were superstars. They had a great effect on teenage girls. They shouted about love, their songs were strong and youthful and it was exciting when they sang. The Beatles were also relaxed about their lives. When asked how long they would be popular, McCartney said: “We never used to think much about the future. But then everyone said 'How long will it last?'. So you start thinking about it. But there’s no answer. It remains to be seen.” The impression of living for the present, of being happy and carefree and going through life without great effort was a large part of the attraction of the early Beatles.
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【判断题】金属材料的上屈服点是指金属试样在拉伸过程中发生屈服而首次下降前的最大应力,下屈服点是指在拉伸过程中不计初始瞬时效应时屈服阶段中的最小应力。
A.
正确
B.
错误
【判断题】食品中的合成色素可以用聚酰胺粉薄层色谱法进行测定。
A.
正确
B.
错误
【多选题】泥浆护壁成孔灌注桩施工时,护筒的作用是()。
A.
保护钻头
B.
定位和保护孔口
C.
阻隔地下水进入孔内
D.
保证钻进的垂直度
E.
保证泥浆的水头高度
【单选题】熔化极气体保护焊时,亚射流过渡的应用范围只是( )焊铝。
A.
MIG
B.
TIG
C.
MAG
D.
SAW
【多选题】泥浆护壁成孔灌注桩施工时,泥浆的作用是( )。
A.
保护孔壁
B.
防止塌孔
C.
排出土渣
D.
冷却和润滑钻
【单选题】如图所示运算电路,当输入电压ui=1mV时,则输出电压uo为( A )。【图片】
A.
运放输出的负饱和值 - u o(sat)
B.
u i 与运放开环放大倍数 A u 的乘积
C.
运放输出的正饱和值 u o(sat)
D.
电源电压 U
【判断题】熔化极气体保护焊时,亚射流过渡的应用范围只能用于MIG焊铝。
A.
正确
B.
错误
【单选题】熔化极气体保护焊时,亚射流过渡的应用范围只能用于()焊铝。
A.
MIG
B.
TIG
C.
MAG
D.
SAW
【单选题】如图所示运算电路,当输入电压ui=1mV时,则输出电压uO为( )。【图片】
A.
运放输出的正饱和值 u O (sat)
B.
运放输出的负饱和值 - u O (sat)
C.
u i 负值与运放开环放大倍数 A u 的乘积
D.
u i 与运放开环放大倍数 A u 的乘积
【简答题】写下你听到的内容 根据自己实际情况,改写第一问的内容并背诵
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