搜题请搜索小程序“爱下问搜题”
问题 填空题

用云母片（不透水）及锡纸制品处理生长一致的燕麦幼苗，然后给予单侧光照射，培养一段时间后，胚芽鞘将：A（）生长，B（）生长，C（）生长，

答案

参考答案：直立；向光弯曲；直立；停止；停止

材料题

阅读下列材料：

材料一我国国内生产总值增长情况

材料二我国工业生产值增长情况

请回答：

（1）有人说 * * 党只会打仗，不会搞建设，你看新中国成立以来，经济也不怎么样！请根据上述材料予

    以反驳。

                                                                                                                                                             

                                                                                                                                                             

（2）1952年到1956年短短4年间我国经济飞速发展，试分析原因。

                                                                                                                                                             

                                                                                                                                                             

                                                                                                                                                             

（3）从1956年到1978年22年间，经济发展状况如何，试分析原因？

                                                                                                                                                             

                                                                                                                                                             

（4）从1978到2001年20多年间经济发展与1956年到1978年间的速度相比，有什么变化？为什么会出现这

    种变化？

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                              

                                                                                                                                                             

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多项选择题

下列有关CRH2A型动车组绝缘测量的主要项目和标准叙述正确的有（）。

A.主回路501C～大地间≥0.2MΩ（使用300V兆欧表）

B.辅助回路SC200A～大地间≥0.1MΩ（使用100V兆欧表）；辅助回路200J～大地间≥0.1MΩ（使用100V兆欧表）

C.加热器回路200P1～大地间≥0.1MΩ（使用100V兆欧表）

D.驾驶室加热器回路：200S～GS间≥0.1MΩ（使用100V兆欧表）
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