题目

阅读理解 A popular saying goes, Sticks and stones may break my bones, but words will never hurt me. However, that's not really true. Words have the power to build us up or knock us down. It doesn't matter if the words come from someone else' or ourselves—the positive and negative effects are just as lasting. We all talk to ourselves sometimes. We're usually too shy to admit it, though. In fact, more and more experts believe talking to ourselves out loud is a healthy habit. This self-talk helps us encourage ourselves, remember things, solve problems, and calm ourselves down. Be aware, tho为“探究种子萌发的环境条件”，小强做了如下实验：在甲、乙、丙三个烧杯中分别放等量的棉花，再将相同数量的玉米种子放在上面，在不同条件下培养，结果如下表．试分析回答：装置甲乙丙场所日光下日光下黑暗中温度23℃23℃23℃棉花状态潮湿干燥潮湿发芽情况全部发芽全不发芽全部发芽（1）通过本实验可以得出种子萌发所需要的条件是______．（2）玉米种子萌发成幼苗所需的营养物质主要是由______提供的；若保证甲、丙两个装置中的棉花保持潮湿，继续培养几周，仍能良好生长的是______组．（3）要证明“黑暗对种子发芽是否有影响”，可选用表中装置______作为对照组实验；你认为通过该实验能得出“黑暗对种子的发芽没有影响”这一结论吗？请简要分析说明：______．（4）实验结束后，小强将玉米幼苗移栽到了室外的花园中．过了几天，他发现原来呈黄色的玉米苗都变成了绿色，原因是______．