题目

根据短文内容及首字母提示，填写所缺单词。 Imagine the scene: You come home after work feeling too tired to cook—only to find a delicious m  1  waiting for you. It sounds like a dream. However, it could be about to come true thanks to a robot cook i  2   by British scientists. They have come up with a set of robotic arms which are able to cook nice food. Perhaps people can b  3   the device in 2017 as a part of high-tech kitchen. Since it seems to be so useful in the future, scientists spent a  4  18 years developing the hands, which are each controlled by 2如图所示，小明将两根含硫火柴点燃后迅速伸入烧杯B中，片刻后取出火柴，振荡烧杯A，观察到高锰酸钾溶液褪色．小明认为是火柴燃烧生成的二氧化硫使高锰酸钾溶液褪色．小红认为这个实验还不足以说明褪色原因，应补做一个实验． (1)你认为小明应该补做的实验是：____________________________． (2)补做该实验的目的是：____________________________________．