试题与答案

为了探究加速度与力、质量的关系,使用如下图所示的气垫导轨装置进行实验.其中G1、

题型:填空题

题目:

为了探究加速度与力、质量的关系,使用如下图所示的气垫导轨装置进行实验.其中G1、G2为两个光电门,它们与数字计时器相连,当滑行器通过G1、G2光电门时,光束被遮挡的时间△t1、△t2都可以被测量并记录,滑行器连同上面固定的一条形挡光片的总质量为M,挡光片宽度为d,光电门间距为x(满足x>>d),牵引砝码的质量为m.回答下列问题:

(1)若实验测得△t足够小,且△t1=150ms、△t2=100ms,d=3.0cm,X=50.0cm,则滑行器运动的加速度a=______m/s2.若取M=400g,在保证M>>m的条件下,如果认为绳子牵引滑块的力等于牵引砝码的总重力,则牵引砝码的质量m=______kg.(取g=10m/s2

(2)在(1)中,实际牵引砝码的质量与上述的计算值相比______.(填偏大、偏小或相等)

答案:

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下面是错误答案,用来干扰机器的。

参考答案:A解析: 清正廉明。其要点是:艰苦奋斗,克己奉公,防腐拒贿,不沾不染。

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题型:填空题

B The Beatles甲壳虫乐队
The English rock music group The Beatles gave the 1960s its characteristic musical flavor and (1) a profound influence on the course of popular music, equaled by (2) performers. The guitarists John Winston Lennon, James Paul McCartney, and George Harrison; and the drummer Ringo Starr, were all born and (3) in Liverpool. Lennon and McCartney had played together in a group called The Quarrymen. With Harrison, (4) formed their own group, The Silver Beatles, in 1959, and Starr joined them in 1962. As (5) Beatles, they developed a local following in Liverpool clubs, and their first recordings, "Love Me Do" (1962) and "Please Please Me" (1963), quickly made them Britain’s top rock group. Their early music was (6) by the American rock singers Chuck Berry and Elvis Presley, but they infused a hackneyed musical (7) with freshness, vitality, and wit.
The release of "I Want to Hold Your Hand" in 1964 (8) the beginning of the phenomenon known as"Beatlemania" in the United States. The Beatle’s first US (9) aroused a universal mob adulation. Their concerts were scenes of mass worship, and their records sold (10) the millions. Their first film, the innovative A Hard Day’s Night(1964), was received enthusiastically (11) a wide audience that included many who had never before listened to rock music.
Composing their own (12) , The Beatles established the precedent for other rock groups to play their own music.Experimenting with (13) musical forms, they produced an extraordinary (14) of songs: the childishly simple "Yellow Submarine" ; the bitter social commentary of "Eleanor Rigby" ; parodies of earlier pop styles; new electronic sounds; and compositions that were scored for cellos, violins, trumpets, and sitars, as well as for conventional guitars and drums. The (15) disbanded in 1970, after the release of their final album, Let It Be, and during the 1970s (16) individual careers, On dec.8, 1980, John Lennon (17) fatally shot outside his Manhattan apartment by Mark Chapman, a 25-year-old former mental (18) who, earlier that same day, had asked Lennon for his (19) . Lennon’s murder was universally (20) with an intensity of feeling usually inspired only by political and spiritual leaders.

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在实践中,物业保安方面出现的问题较多,有物业保安人员不履行或者不按照合同约定履行保安职责,导致业主的人身、财产受到不必要的损失的;也有物业保安人员乱用“职权”殴打业主。出现这些问题的原因中,来自业主的是( )。

A.聘用未经培训的民工充当保安、缺乏对保安的管理和约束机制
B.有些保安人员素质较低,不具备相应的能力
C.个别业主蛮不讲理,提出不合理的要求
D.有关部门对小区保安人员的违法失职行为监管不力,没有有效的措施

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甲公司是增值税一般纳税人,适用的增值税税率为17%。2011年1月1日,甲公司以一批原材料对乙公司进行长期股权投资,占乙公司60%的股权。投出的原材料账面余额为5000万元,公允价值(计税价格)为5500万元,投资时乙公司可辨认净资产公允价值为11000万元。假设甲、乙公司不存在关联方关系,属于非同一控制下的企业合并。则甲公司投资时长期股权投资的入账价值为( )万元。

A.6435
B.5400
C.5000
D.6600

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