孙中山说：“欧美各国，善果被富人享尽，贫民反食恶果，……故此成不平等的世界。……

输入国家规定的( )入境的动植物、动植物产品及其它检疫物等，还需持特许审批单报检。

A．禁止

B．限制

C．特许

D．许可

按照《科技项目招标投标管理暂行办法》的规定，下列选项中不属于科技项目招标投标的具体规定的内容是（）。

A.监督管理部门

B.资格预审办法

C.不招标的条件

D.投标无效的情形

女性，62岁，主诉右膝关节间断性肿胀半年，其他关节无症状，曾经穿刺抽液发现暗红色关节液，检查右膝关节滑膜肥厚，关节积液，首先考虑的初步诊断是（）

A.舍格伦综合征

B.类风湿关节炎

C.骨性关节炎

D.结核性滑膜炎

E.色素沉着绒毛结节性滑膜炎

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.

给水泵为什么会有轴向推力？