单项选择题
为变量word赋值为“hello world”的语句为（）。
A.word=hello world
B.word as "hello world"
C.word is "hello world"
D.word="hello world"
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单项选择题
A.word=hello world
B.word as "hello world"
C.word is "hello world"
D.word="hello world"
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