【判断题】In paragraph 11, China has been rocked by a series of food and product safety problems. In this sentence, rock means shock.
【判断题】Product safety means ensuring that the products entering the market are not harmful, it is totally the responsibility of the company.
【单选题】在机器数( )码表示中,零的表示形式是唯一的。
【判断题】Product safety means ensuring that the products entering the market are not harmful, it is totally the responsibility of the company.