问题 选择题

小刚和几位同学在探究两个品种花生果实大小变异的时候, 得出如下结论, 你认为不正确的是 (    )

A.同一品种的花生大小有差异, 说明变异是普通存在的

B.大花生品种中的小花生只占少数, 说明还是遗传物质起决定作用

C.选小花生品种中的大花生种在地里, 一定会结出大花生

D.两个花生品种的差异是由不同的基因决定的

答案

答案:C

大花生种如果种在贫瘠的土壤里,结出来的会是小花生,外界环境条件对生物会产生影响,形成不可遗传变异。

阅读理解

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In spite of ill health and a physical incapacity(伤残)that threatened her career, Carson McCullers completed a novel in the summer of 1961 that made the best-seller list before its official publication; date by virtue of(由于)prepublication sales.

In an interview at her home, the noted novelist looked back on some of her problems of recent years and spoke without emotion of her latest book, Clock without Hands, her first in fifteen years, "For many years I had been thinking of the novel and finally wrote it this passed year. ""The tall, frail novelist, forty-three years old in 1961, suffered a series of strokes in her twenties that left her partially incapacitated, and she also admitted that a mental block kept her away from writing for many years after the strokes.

Mrs McCullers once wrote that "writing is a wandering, dreaming occupation. " But beyond the admission that she works" very hard" at her writing, she is shy about discussing her work. She is remote from literary fashions, and she has never learned to intellectualize her art, but she reads her critics and takes them seriously.

Clock Without Hands depicts (叙述) Mrs McCullers' native South and the slow passing of the old way of life through the lives of a dying pharmacist (药剂师), a white judge and former congressman, his rebellious grandson, and two Negroes. Among her earlier noted works are Member of the Wedding, The Heart is a Lonely Hunter, and Ballad of Sad Cafe.

71. The novel made the best-seller list ______.

A. one month after publication            B. immediately upon publication

C. before publication                    D. before completion

72. Mrs McCullers' comments about Clock without Hands were______.

A. enthusiastic                     B. defensive

C. shy and self-conscious             D. unemotional

73. Clock without Hands was the product of ______.

A. many years of work B. one year of work C. many years of thought D. both B and C

74. Mrs McCullers did not write for many years because ______.

A. strokes left her partially incapacitated      B. she had a mental block

C. she had no ideas        D. both A and B

75. According to the selection, Mrs McCullers_____.

A. follows literary fashions   B. intellectualizes her art

C. discusses her work avidly(热心的)     D. takes her critics seriously

名词解释