下列各式的变形中是因式分解的为（）A.3x（2x+5）=6x2+15xB.2_爱下问搜题

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问题选择题

下列各式的变形中是因式分解的为（）

A.3x（2x+5）=6x²+15x
B.2x²-x+1=x（2x-1）+1
C.x²-xy=x（x-y）
D.a²+b²=（a+b）（a-b）

答案

答案：C

阅读理解

想知道英国男孩Danny 在写给他的笔友Lin Tao 的信中都说了些什么吗？一起来看看吧！不过，看完信可别忘记回答问题哟！

　　Thank you for your letter. Do you want to know about my family? I live with my
mum, dad and grandma in a big house in London.

　　I have a brother. His name is Janson and he's fourteen. He lives in Sydney in
Australia.

　　Do you like games? I like soccer. I often play soccer with my friends.

　　I have two pets. They are a cat and a dog. I want a bird, but my mother doesn't
like it.

　　Please write to me.

　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　Danny

1.Danny lives in__________.

A.a small house
B.London
C.Australia
D.Sydney

2.How old is Danny's brother?

A.11
B.12
C.13
D.14

3.There are__________people in Danny's family.

A.three
B.four
C.five
D.six

4.Danny often plays soccer with his _____.

A.mum
B.dad
C.grandma
D.friends

5.What's the Chinese for "pet"?

A.朋友
B.宠物
C.玩具
D.同伴

单项选择题

人身保险不包括( )。

A．责任保险

B．人寿保险

C．意外险

D．疾病险