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【单选题】
下列关于JavaScript变量命名的说法中正确的是（）A.
可以使用数字开头
B.
不区分大小写
C.
可以包含空格
D.
不能使用JavaScript关键字
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皮皮学刷刷变学霸
举一反三
【单选题】I visited Mr. Johnson during his stay in Shanghai _____ he attended a most important conference there. [ ]
A.
when
B.
which
C.
where
D.
in which
【简答题】He took the conference in Brussels as another opportunity to discuss with those who are interested in the economic future of Cyprus about how to best promote economic opp______ there.
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