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【多选题】
适应性免疫应答的特点包括A.
感染早期起作用
B.
特异性
C.
后天性
D.
记忆性
E.
自我耐受性
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举一反三
【单选题】What is implied by 'the younger ones are surrounded by more children's language on average than the older kids' (Para.3)?
A.
Younger children need parental rather than siblings' attention.
B.
Younger children need siblings' rather than parental attention.
C.
Younger children feel uncomfortable with more siblings.
D.
Younger children have less chance to talk with their parents.
【简答题】A.Boys and older children. B.Boys and younger children. C.Girls and younger children. D.Girls and older children.
【简答题】基本RS触发器的触发方式是__________触发。
【简答题】交车前检查是指___________对车辆外观、清洁情况、维修项目完成情况进行的检查。
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