—The cake looks ____ (good).
—Yes, and it tastes even ____ (good).
用测电笔接触洗衣机的外壳时测电笔的氖管发光，这说明洗衣机外壳跟____ 线相通；为了防止人在使用洗衣机时触电，应采取的措施是将洗衣机的外壳____
