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干扰素是一种小相对分子质量的( )，功能是非特异性抗( )感染物质。
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举一反三
【单选题】. —He must be a true friend, isn’t he? —Of course he is. He seldom ____________ a bad word about others.
A.
speaks
B.
talks
C.
says
D.
tells
【单选题】—Is he interested in sailing? — Of course! In fact he is known ________ as the most daring sailor on the seas.
A.
far and wide
B.
then and there
C.
safe and sound
D.
up and down
【简答题】我们党正式宣布人民生活总体达到小康水平，是在()。 A1997年党的十五大 B2002年党的十六大 C2006年党的十六届六中全会 D2007年党的十七大
【简答题】A．He feels comfortable with the course. B．He doesn't like the course. C．He can't understand the course. D．He doesn't want to answer the question.
【单选题】Of course he behaves awfully,but _______ he is your brother.
A.
above all
B.
all over
C.
after all
D.
for all
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