物理性消毒法有：日光消毒法、干燥消毒法和（）。
A.热消毒法
B.冷冻消毒法
C.生物热消毒法
参考答案：A
Studies show that MP3 people have made much use of _____ music may be causing hearing loss.[ ]
A. enjoy
B. to enjoy
C. enjoying
D. enjoyed
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