题干
—Can I call you back at two o'clock this afternoon?
—I'm sorry, but by then I ____(fly) to Beijing. How about five?
答案(点此获取答案解析）
will be flying
—Can I call you back at two o'clock this afternoon?
—I'm sorry, but by then I ____(fly) to Beijing. How about five?
表示）均可单独控制，电热丝（用 
表示）只有在吹风机启动后才可以工作。下列所示电路图中，符合上述要求的是（ ）