题目

   I'm Rich Kleinfeldt with some financial expressions used in business and the stock market.    Our first expression is in the red.  It is another way of saying that a business is losing money. In the past ,numbers in the financial records of a company were written in red ink to show a loss.    A business magazine recently published a report about a television company. The report said the company was still in the red. but was able to cut its loss from the year before.    A profit by a business is written in black numbers. So a company that is in the black is making money. � (新情景题·综合题)如下图是一种活性炭净水器示意图，这种净水器可以除去水中难溶性固体，同时利用活性炭的________作用除去水中的悬浮杂质和溶解杂质．