Hello，I'm Lily．I have a big and happy family．My father，Jack，is a maths teacher．He has black glasses．He is in the living room now．My mother，Judy，is tall and thin．She has long hair．Where is she? Ha—ha，she is in the kitchen．She can cook yummy food．

    Who's this girl? She has a blue hat．Yes，she's my baby sister，Lula．She is watching TV in the living room．I have a brother，too．His name is Ben．Ben is fat，he likes candies very much．It's not good．Do you see my little puppy? His name is Mimi．Look，he is in the bedroom with Ben．"Would you like some candies?" Ben asks．

    Guess，where am I? In this room，you can see a computer on the desk．Near the desk．It's my schoolbag．A blue chair is near the desk，and I can sit on it and read many books．I like stories very much．And I have twenty storybooks on my big desk．Yes，I'm in the nice and big study．

    I love my family!

⑴读短文，选择正确图片；⑵⑶⑷⑸⑹⑺判断正误。

在横线上填上合适的数。

$\underset{\_}{}$ ＋ $\underset{\_}{}$ = $\underset{\_}{}$          $\underset{\_}{}$ + $\underset{\_}{}$ = $\underset{\_}{}$

$\underset{\_}{}$ - $\underset{\_}{}$ = $\underset{\_}{}$           $\underset{\_}{}$ － $\underset{\_}{}$ = $\underset{\_}{}$

金属材料与人类的生产和生活密切相关．

（1）铝是重要的金属元素．如图为地壳元素含量分布图，能表示铝元素的是____ （填数字序号）．

（2）金属可用来制电线、炊具，表明金属具有的物理性质有____ ．

（3）自行车链条是最易生锈的部件，工厂在生产链条时在表面做了烤蓝（在表面形成一层致密的四氧化三铁氧化膜），这样处理的目的是____ ．

（4）在工厂，工人常把生锈的铁制品浸泡在盐酸中除锈，其反应的化学方程式为____ ．

***有过这样的比喻:政府的职责就是管好两个灯。一个是路灯,另一个是红绿灯。管好路灯,就是要创造一个公平公正的环境,为所有人照路;管好红绿灯,就是要讲规则。关于公平,下列认识正确的是(      )

①社会公平对社会的稳定发展具有重要意义     ②社会公平对个人的发展没有任何意义

③增强规则意识,才能更好地维护公平             ④公平就是让人人拥有相同的权利和机会

已知直线y=2x+（3﹣a）与x轴的交点在A（2，0）、B（3，0）之间（包括A、B两点），则a的取值范围是____．