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【单选题】
具有非特异性杀伤作用的细胞是A.
Th细胞
B.
Tc细胞
C.
TCR细胞
D.
NK细胞
E.
Ts细胞
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【简答题】Who are the holders of bills of exchange, list two of them.
【单选题】装运港船上交货术语的最主要特点是（）
A.
把船舷作为划分买卖双方风险与费用的分界线
B.
是一种传统的、常用的国际贸易术语
C.
适合于任何一种运输方式
D.
不宜适用集装箱运输
【单选题】Who among the following list of people is an early 20th century economist from Yale University who wrote the book The Theory of Interest?
A.
Gustav Cassel
B.
Irving Fisher
C.
David Ricardo
D.
Paul Krugman
E.
Israel Kirzner
【单选题】Who tops the list for the third year in a row?
A.
Bill Gates.
B.
Warren Buffett.
C.
Carlos Slim.
D.
Li Ka-shing.
【单选题】Who are on the danger list?
A.
Petersville and Wallsend.
B.
an electrical engineer and John Phillips.
C.
John Phillips' wife and two children.
D.
another six people who were on the train.
【简答题】Who needs a to-do list most?
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