问题 选择题

下图是利用三倍体香蕉的茎尖培养脱毒香蕉植株的过程示意图。下列叙述正确的是

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A.①~③过程中发生了有丝分裂和减数分裂

B.对香蕉进行花药离体培养可获得单倍体

C.②阶段为脱分化过程

D.X代表愈伤组织

答案

答案:D

完形填空

阅读下列各小题,根据括号内的汉语提示,用句末括号内的英语单词完成句子,并将答案写在答题卡上的相应题号后。

小题1:We should encourage children to read classics, most of which                       (很有益处)to the growth of our children.(benefit)

小题2:I like these blue jacket very much; it costs______________________(三倍)the one hanging in the window. (as).

小题3:They say the accident happened because the carelessness of the driver, but in my opinion, it is the cyclist rather than the driver _____________________(应负责任).(blame)

小题4:_____________________ (一旦被发现偷东西)in the supermarket, any salesperson will be fired at once. (once)

小题5: Project Hope aims at helping more children in poor areas to          _  (有受教育的机会 ) .  (access,receive)

小题6:Never        (我碰到过)such a person. with a talent for songwriting in the past ten years.(come)

小题7:. If you were cast away on a deserted island,              (你会怎么办)? (do)

小题8: The headmaster left word with my parents                (他要来拜访)next Sunday . (pay)

小题9: After the war, a new school building was put up___________________________ (在曾经是一家剧院的地方). (where)

小题10:The officials were discussing the plan that they would like to see                (实现) the next year . (carry)

名词解释