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【单选题】
There are 9 groups in total. The special organs of poultry that are used as air storage devices to participate in lung respiration are （ ）？A.
n ose
B.
pharynx
C.
throat
D.
airbag
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【简答题】C As A/H1N1 continues to spread, experts from the Centers for Disease Control to the World Health Organization to neighborhood doctors are calling on the people to practice smart flu prion techni...
【简答题】深受······的影响
【单选题】关于免疫耐受描述错误的是··············································( )
A.
只对特定抗原表现为免疫无应答
B.
一般不影响适应性免疫应答整体功能
C.
只能在中枢免疫器官内发生
D.
不同于免疫缺陷和免疫抑制
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