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【单选题】
--- Daniel must have lost his job in that unemployment crisis, __________he? --- I don’t think so．Yesterday I saw him working together with his colleagues.A.
didn’t
B.
doesn’t
C.
mustn’t
D.
hasn’t
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举一反三
【单选题】已知全集U=R，A?U，B?U，如果命题P： 2 ∈A∪B ，则命题非P是（ ）
A.
2 ?A
B.
2 ∈( C U A)
C.
2 ∈( C U A)∩( C U B)
D.
2 ∈( C U A)∪( C U B)
【单选题】Photoshop CS6中文版控制面板:在Photoshop CS6中课通过“”菜单对不同的控制面板选择并进行编辑( )。
A.
视图
B.
文件
C.
编辑
D.
窗口
【简答题】5 Complete the text. My
cousin has just written a reference book. He’s not ► well known, but he’s
a good (1) a ____. His book might attract a lot of (2) a ____ because it’s
called ‘How to make a l...
【简答题】婴儿辅食添加的原则应遵循( )、( )、( )、( )、( )的原则。
【简答题】It’s often true that jobs for students sometimes lead to employment after graduation, so it’s a good idea to think carefully before you begin working during your college years. During my entire colleg...
【简答题】（1）当a=0时，求 （C U A）B； （2）若（C U A）B恰有2个元素，求a的取值范围
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