A、Brushing teeth twice a day. B、Flossing teeth once a day. C、Avoiding eating salty snacks. D、Seeing dentists regularly. C由女士所回答的

M: Help us out with what we need to know to achieve a beautiful smile.
W: There’ re four things you should do: you should brush twice a day, floss once a day, a-void sugary snacks and see your dentists regularly.
M: We’ve been joking about the power of cheese.
W: Right. Researchers say a piece of cheese will boost saliva, and wash away the acids in the mouth, and the minerals in cheese will help strengthen the teeth from inside out.
M: Important to know that we’ re not recommending cheddar. It won’ t work.
W: Right.
M: Drinking out of a straw. Another piece of advice.
W: That’s right. People use straws to limit the amount of time the liquid is exposed to the teeth. But people don ’ t know that sugary drinks, sodas, even sugar-free sodas have acids that can cause harms to the enamel.
Q10: Which of the following is NOT included in the dental hygiene?
Q11: Which of the following statements is INCORRECT about the effect of cheese?
Q12: Which of the following is NOT recommended to drink through straws?