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【单选题】Until about 30 years ago, language researchers focused their studies on infants who had already begun to babble, according to Jusczyk, who has written a book on how children acquire language titled Th...
A.
By listening to the sounds.
B.
By repeating the sounds.
C.
By listening to their own babbling.
D.
By uttering the sounds.
【单选题】在新型冠状病毒感染的肺炎防控中常见医用防护用品使用范围指引中（试行），乳胶检查手套的使用范围为（）。
A.
预检分诊
B.
发热门诊
C.
隔离留观病区、隔离病房、隔离重症病房
D.
以上都正确