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【单选题】
能促进NK细胞发育分化的细胞因子是A.
IL-15
B.
IL-5
C.
IL-11
D.
IL-13
E.
IL-12
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皮皮学刷刷变学霸
举一反三
【单选题】She said she wouldn't call us the next day, ______ she?
A.
would
B.
wouldn't
C.
did
D.
didn't
【单选题】Mrs. Smith didn't call the police because ______.
A.
she was on the bus
B.
she was not sure whether she had the ten pound notes with her
C.
she was too angry to do so
D.
she didn't like to make trouble for others
【单选题】Why didn't Linda answer the third phone call? Because ______.
A.
she didn't speak to her father
B.
she thought it was that man again
C.
she was tired of answering phone calls
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