探究“声音从哪里来”这一科学活动的核心经验是
A.声音的响度
B.声音的音调
C.物体振动产生声音
D.声音的音色
正确答案是C
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Complete the following sentence with a (compound) word derived from the one(s) given in bracket.
Doctors are now using surgery to preserve ( ) in many people with a certain disease who would otherwise go blind. (eye;sight)