单项选择题

Questions 11—13 are based on the following passage. You now have 15 seconds to read Questions 11—13.
What does tooth contain according to the passage

A．Nerves and blood vessels.
B．Nerves and skin tissue.
C．Nerves and muscles.
D．Nerves and plaque.

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单项选择题

单项选择题

Questions 11—13 are based on the following passage. You now have 15 seconds to read Questions 11—13. What does tooth contain according to the passage 您的浏览器不支持 audio 元素。