已知x = {1:2, 2:3, 3:4},那么表达式sum______ 的值为_。______
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表达式re.search(r’\w*?______ \s+______ \w*?’, ‘Beautiful is is better than ugly.’).group______ 的值为_。______
已知x = [1, 2],那么执行语句x______ = [3, 3]之后,x的值为_。([3, 3, 1, 2])
已知列表x = [1, 2],执行语句y = x[:]后,表达式id______ == id______ 的值为_。______
执行语句x,y,z = map(str, range______ ) 之后,变量y的值为_。______