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【单选题】
下列选项中( )可以正确显示如图所示的对话框。A.
confirm("欢迎学习JavaScript");
B.
alert("欢迎学习JavaScript");
C.
document.write("欢迎学习JavaScript");
D.
document.open("欢迎学习JavaScript");
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A.
正确
B.
错误
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A.
in
B.
at
C.
to
D.
on
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