题干

下面的简式表示植物组织培养的大致过程,据此判断不正确的是  (  )

A:若①是来自不同植物体细胞融合的杂种细胞,则④可能出现不同植物的遗传特性

B:若①是花粉,则④是单倍体植株,经染色体加倍后可得到稳定遗传的品种

C:若①是人参细胞,对②进行扩大培养可提高细胞产物人参皂甙的产量

D:若①是具有杂种优势的农作物细胞,则用③进行繁育会发生性状分离

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答案(点此获取答案解析)

D

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阅读下列文字,回答文后问题。
                                                                                              嫉妒的山丘
                                                                                          [法国]雨果
                                                                            嫉妒的山丘有一天对阿特拉斯山说:
                                                                         “你看我们的芳草地,你看我们绿油油的牧场,
                                                                            少女前来自由散步,
                                                                            唱歌,欢笑,唱过以后遐想;
                                                                            你看我们的脚,海浪吻着几乎不带吼声,
                                                                            野蛮的海洋!你看我们额头的明净,
                                                                            炎热的夏天和眼珠似的露水,
                                                                            使它戴上花冠,光彩照人!
                                                                          “但是你,巨人——究竟怎么回事,在你秃顶上,
                                                                            长着褐色眼睛的鹰不断翱翔?
                                                                            究竟是谁,像是鸟在上面筑巢的树枝,
                                                                            使你的宽肩和铁背弯成这样?
                                                                            为什么在你黑黝黝的肋部有如许黑黢黢的深渊?
                                                                            究竟是什么永恒的暴风打击你,以阴沉的电光?
                                                                            究竟是谁在你头额上放下如许的皱纹、如许的雪?
                                                                            从没有露出春天微笑的脸,
                                                                            究竟是谁把它完成这样?
                                                                            而且把它泡在什么汗水里边?……”
                                                                            阿特拉斯回答说:“那是因为我背负着一个世界。”
                                                                                                             (注:阿特拉斯是希腊神话中顶住天的巨神。)