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举一反三
【单选题】B细胞区别于其他APC的特点是
A.
吞噬摄取抗原
B.
胞饮摄取抗原
C.
通过甘露糖受体摄取甘露糖化抗原
D.
通过BCR直接摄取抗原
E.
通过FC受体摄取抗原-抗体复合物
【单选题】Every year television stations receive hundreds of complaints about the loudness of advertisements. However, federal rules forbid the practice of making ads louder than the programming. In addition, t...
A.
TV stations always operate at the highest sound levels
B.
their sound levels are kept around peak levels
C.
their sound levels are kept in the middle frequency ranges
D.
unlike regular programs their intensity of sound varies over a wide range