问题 选择题

“麻雀虽小,五脏俱全”.麻雀体内存在不同的结构,主要是(  )

A.细胞生长的结果

B.细胞分化的结果

C.细胞分裂的结果

D.细胞癌变的结果

答案

细胞分化就是由一种相同的细胞类型经过细胞分裂后逐渐在形态、结构和功能上形成稳定性差异,产生不同的细胞类群的过程.
细胞分化的过程大致是:细胞分裂所产生的新细胞,起初在形态、结构方面都很相似,并且都具有分裂能力.后来除了一小部分细胞仍然保持着分裂能力以外,大部细胞失去了分裂能力.在生长过程中,这些细胞各自具有了不同的功能,它们在形态、结构上也逐渐发生了变化,结果就逐渐形成了不同的组织.经过细胞分化,在多细胞生物体内就会形成各种不同的组织.由不同的组织构成器官,由不同的器官构成植物体;或不同的器官构成系统,由八大系统构成动物体.细胞分裂使细胞数目增多,细胞生长使细胞体积增大.

故选:B.

阅读理解

阅读理解

FRIDAY, November 12

    JAZZ with the Mike Thomas Jazz Band at The Derby Arms. Upper Richmond Road West, Sheen.

    DISCO Satin Sounds Disco. Free at The Lord Napier, Mort Lake High St., from 8 a. m. to 8 p. m.

Tel. 6821158.

    SATURDAY, November 13

    JAZZ Lysis at The Bull's Head, Barnes. Admission 60p.

     MUSICAL HALL at The Star and Garter, Lower Richmond Road, Putney, provided by the Aba

Daba Music Hall company. Good food and entertainment fair price. Tel. 7896749.

     FAMILY night out? Join the singalong at The Black Horse. Sheen Road, Richmond.

    JAZZ The John Bennett Big Band at The Bull's Head, Barnes. Admission 80p.

     THE DERBY ARMS, Upper Richmond Road West, give you Joe on the electric accordion (手风琴). Tel: 7894536.

     SUNDAY, November 14

     DISCO Satin Sounds Disco, free at The Lord Napier, Mort Lake High Street, from 8 a. m. to 8 p. m. .

     FOLK MUSIC at The Derby Arms. The Short Stuff and residents the Norman Chop Trio.

Nonremembers 70p. Tel. 6884626.

     HEAVY MUSIC with Tony Simon at The Bull, Upper Richmond Road West, East Sheen.

     THE DERBY ARMS, Upper Richmond Road West, give you Joe on the electric accordion.

1. Where and when can you hear the Norman Chop Trio?

 A. At the Bull's Head on Sunday.

 B. At the Derby Arms on Sunday.

 C. At the Bull on Saturday.

 D. At the Black Horse on Saturday.

2. Where and when can you hear the Mike Thomas Jazz Band?

A. At the Derby Arms on Friday.

B. At the Black Horse on Friday.

C. At the Star and Garter on Saturday.

D. At the Derby Arms on Sunday.

3. If you want to enjoy the electric accordion on Saturday, which number do you have to ring to

    find out when it starts?

A. 7896749.                                           

B. 7894536.

C. 6821158.                                            

D. 6884626.

4. If you want to spend the Saturday by joining the entertainment with your family, where should you go?

A. Disco at The Lord Napier.

B. The singalong at The Black Horse.

C. The electric accordion at The Derby Arms.

D. Jazz at The Bull's Head.

5. If you want to spend the same day at two different places and don't want to cross any street,

    which of the following is your best choice?

A. The singalong at The Black Horse and Jazz at The Bull's Head.

B. The singalong at The Black Horse and Folk Music at The Derby Arms.

C. Folk Music at The Derby Arms and Heavy Music with Tony Simon at The Bull.

D. Musical Hall at The Star and Garter and Disco at The Lord Napier.

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