【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（　　）

【单选题】关于辅食添加的原则错误的是( )

【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( )。

【单选题】下列辅食添加的原则中错误的一项是

【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】已知U=R，集合A{x|x＜或x＞2}，则CUA= (A)(-2,2) (B)(-∞,-2)U(2,+∞) (C)[-2,2] (D)(-∞,-2]U[2,+∞)

【单选题】婴儿辅食添加的原则以下不正确的是

【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