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【简答题】
f（x）是定义在R上的奇函数，当x＞0时，f（x）=3 x ，则f（-2）=（ ）。
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举一反三
【单选题】在Windows 7中,关于文件名,下列说法错误的是________。
A.
文件或文件夹的名字最多可以由255个字符组成
B.
文件名中可以有多个小数点
C.
文件名中不能含有‘：<>|等符号
D.
可以使用*和？命名文件
【单选题】听力原文：M: Are you tired of driving? W: No, I'm fine. M: Where is my briefcase? W: Isn't it on the back seat? M: No, I don't see it. All my important papers are in it. W: You may have left it at the hote...
A.
Some jewellery.
B.
Important papers.
C.
Money.
【简答题】上传Excel奖学金作业
【单选题】听力原文：M: What did I do with my briefcase? W: Isn't it on the back seat? M: No, I don't see it. All my important papers are in it. W: You may have left it at the hotel. Should we turn around and go back...
A.
Some jewellery．
B.
Important papers．
C.
Money．
【简答题】上传Excel奖学金作业
【单选题】关于Windows的文件和文件夹的命名，下列说法错误的是( )。
A.
名字可由250个大小写字符组成
B.
名字中不可以有空格
C.
不能用大小写来区分不同文件
D.
主文件名和扩展名之间用小数点分隔
【简答题】My briefcase is brown and square. And there ______________ a book and an USB disk in it.
【单选题】听力原文：M: Are you tired of driving? W: No, I' m fine. M: Where is my briefcase? W: Isn't it on the back seat? M: No, I don't see it. All my important papers are in it. W: You may have left it at the hot...
A.
Some jewellery.
B.
Important papers.
C.
Money.
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