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【单选题】
有关干扰素的叙述错误的是A.
干扰素有病毒作用
B.
干扰素的抗病毒作用具有相对的种属特异性
C.
干扰素对正常细胞几乎无作用
D.
干扰素有抗肿瘤细胞分裂作用
E.
使用干扰素无副作用
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【单选题】A computer _____ think for itself; it must be told what to do.
A.
can’t
B.
wouldn’t
C.
mustn’t
D.
may not
【简答题】齐白石先生幼年家境贫寒，没有上学的机会，长大后做了木工，四十岁以后才开始自学绘画。他虚心求教，勤学苦练，终于在画坛独树一帜，成为著名的国画犬师。 问题： (1)试述影响能力形成与发展的因素。 (2)在齐白石先生的成才过程中哪些因素起关键作用?对你有何启示?
【单选题】A computer ______ think for itself. It must be told what to do.
A.
can't
B.
couldn't
C.
may not
D.
might not
【单选题】A computer ______ think for itself. It’s always told to do things.
A.
mustn’t
B.
can’t
C.
shouldn’t
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