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【单选题】
以下选项中不能用作变量名的是( )。A.
_float
B.
switch
C.
sum
D.
_123
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举一反三
【简答题】Runners in a relay race pass a stick in one direction. However, merchants passed silk, gold, fruit, and glass along the Silk Road in more than one direction. They earned their living by traveling the ...
【单选题】根据以下材料，回答题 New Understanding of Natural Silk's Mysteries Natural silk， as we all know， has a strength that manmade materials have long struggled to match. In a discovery that sounds more like an ancie...
A.
Right
B.
Wrong
C.
Not mentioned
【单选题】She removed ________ hat she was wearing and tried on ________ black silk one. [ ]
A.
a; a
B.
the; the
C.
the; a
D.
a; the
【简答题】拌燃面时随即加入什么油（ ）拌匀A. 辣椒油，香油，酱油
【简答题】Java语言只支持________继承。
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