单选题
Why does the author mention a bell and a rattle in lines 4-5 ?
A、
(To contrast the reactions of babies to human and nonhuman sounds
B、
( To give examples of sounds that will cause a baby to cry
C、
( To explain how babies distinguish between different nonhuman sounds
D、
( To give examples of typical toys that babies do not like
【正确答案】
A
【答案解析】
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