单项选择题
Human facial expressions differ from those of animals in the degree to which they can be ______ controlled and modified.
A．deliberately
B．delicately
C．definitely
D．defectively
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尽管我们对“学习”的理解不尽完善，然而我们对此已有不少了解。“学习”可以呈现不同的形式，也可以在许多情况下进行。一般来说，“学习”必然会引起行为的变化。“学习”导致人们行为发生变化时，这种变化常能持久。“学习”也许意味着对一系列细小而不相关的行为按新的顺序重新排列。就好比你在钢琴上学习弹奏一首新的曲子。
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单项选择题
Born of the same parents, he bears no ______ his brothers.
A．traits with
B．resemblances to
C．personalities between
D．characters among
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