A-A+
A．Information on sources of infection.B．Sugges
问题详情
A．Information on sources of infection.
B．Suggestions on how to treat heating loss.
C．A chart of sounds and decibel levels.
D．A list of doctors who test hearing.
参考答案
正确答案：C
解析：理解推理题。文中提到If you pass along this hand-out，we can take a look at the decibel level of some common campus sounds而这些信息在手册中有可能以图表形式出现。
