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【单选题】
初始 T 细胞是A.
已初次接触过抗原的成熟 T 细胞
B.
未接触过抗原的成熟 T 细胞
C.
已初次接触过抗原的不成熟 T 细胞
D.
未接触过抗原的未成熟 T 细胞
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反馈参考答案：
举一反三
【简答题】磁感线的疏密定性的表示磁场的强弱,在磁感线较密的地方磁场( ),在磁感线较疏的地方磁场( )。
【简答题】磁感线越密的地方磁场越 ,磁感线越疏的地方磁场越 。
【单选题】The company has just launched an advertising campaign to ____ their newly produced bicycles.
A.
advocate
B.
urge
C.
motivate
D.
promote
【单选题】What has Bernd Fischer's Bearings Company done to maintain their market position?
A.
Kept product availability.
B.
Encouraged technological innovation.
C.
Improved customer support.
D.
All of the above.
【简答题】A sample of executives were surveyed about their loyalty to their company. One of the questions was, “If you were given an offer by another company equal to or slightly better than your present positi...
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