单项选择题
A.next B.prev C.element D.list
A.0 1 2 and 0 1 2 B.0 1 2 and 3 3 3 C.3 3 3 and 0 1 2 D.3 1 3 and 0 1 2
A.Promise Hi!resolved B.Hi!Promise resolved C.resolved Hi!Promise D.Hi!resolved Promise
A.遍历器(Iterator) B.for of C.for in D.froeach
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