氯气注入水中会产生（），能够杀死水体中的致病菌，使自来水清洁卫生，适于饮用。
A、臭氧
B、二氧化氯
C、次氯酸
D、液氯
参考答案：C
按要求写句子。
1. My English teacher is Miss Wang. (对画线部 分提问)
_____ _____ your English teacher?
2. I usually go to bed at 9:30 every evening. (对画线部分提问)
_____ _____ you go to bed every evening?
3. This action movie is so boring. (对画线部分提问)
_____ do you _____ this action movie?
4. My sister is a famous musician. (对画线部分提问)
_____ _____ your sister?
5. She works for a long time. (改为否定句)
She _____ _____ for a long time.
进场砖的外观质量检查要求，外观检查的砖样为（）。
A．60块
B．100块
C．120块
D．200块
