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【单选题】
在感染早期，能非特异杀伤病毒感染细胞的免疫因素是A.
巨噬细胞
B.
NK细胞
C.
B细胞
D.
Thl细胞
E.
CTL
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反馈参考答案：
举一反三
【简答题】The President failed in his attempts to win the second term because he hadn't fulfilled his __________ made in the previous election.
【单选题】The motorist had to __________ to avoid knocking the old woman down in the middle of the road.
A.
swerve
B.
twist
C.
depart
D.
swing
【判断题】Avoid overusing of repetition and restatement in our speech helps us to attract the audience.
A.
正确
B.
错误
【单选题】Parents should help their kids to avoid overusing cell phone or social websites in general.
A.
父母应该帮助孩子们避免过度使用一般的社交网址和手机
B.
父母应该帮助孩子避免过度使用手机和一般社交网站。
【简答题】The President failed in his attempts to win the second term because he hadn’t fulfilled his _________ made in the previous election.
【简答题】The President failed in his attempts to win the second term because he hadn’t fulfilled his ( ) （承诺）made in the previous election.
【简答题】螺纹联接的基本类型有哪些?
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