把二元二次方程x2-2xy-3y2=0化成两个一次方程,那么这两个一次方程分别是

题型:填空题

问题:

把二元二次方程x2-2xy-3y2=0化成两个一次方程,那么这两个一次方程分别是______.

考点:三元(及三元以上)一次方程(组)的解法
题型:填空题

阅读下面的短文,完成文后的任务。

Judy: Hello, Chen Xuan! This is Judy.

Chen Xuan: Hi, Judy. Where are you? I miss you very much.

Judy: I'm in Germany. I'm studying here now.

Chen Xuan: That's great! How's it going?

Judy: Not bad. How about you?

Chen Xuan: Pretty good. How's the weather there?

Judy: (4) It's cold and dry. It's snowing outside.

Chen Xuan: Snowing? Hainan is sunny and hot. (5)The weather is quite different in different places.

Judy: You're right! What are you doing now?

Chen Xuan: I'm talking to my good friend, Judy!

Judy: Oh, yes!

任务1:根据短文内容回答下列问题。

1. Where is Judy?

____________________________________________________________________

2. How's the weather in Germany?

____________________________________________________________________

3. What's Chen Xuan doing?

____________________________________________________________________

任务2:将文中划线的句子翻译成汉语。

4.  ____________________________________________________________________

5. ____________________________________________________________________  

题型:填空题
分析下面的表格内容,把表格传达的主要信息补写完整。
年龄
美国
中国
9~24个月
自己扔尿布
认字
2~3岁
扔垃圾、整理玩具、浇花、喂宠物
背唐诗
3~6岁
铺床、摆餐具、擦桌子、收拾房间
各种艺术能力培训
6~12岁
做简单的饭、清理洗手间、使用洗衣机
做作业、艺术培训
13岁以上
换灯泡、做饭、洗衣、修剪草坪
做作业、艺术培训
小题1:美国家长认为,孩子应该__________________________________________
小题2:中国家长认为,孩子应该_________________________________________
小题3:你认可哪种教育方式?______________________________________________________________
理由是______________________________________________________________
题型:填空题

This means ____ wetlands will disappear, and there will be ____ space for plants, animals and birds.        [ ]

A. less and less; more and more        

B. less and less; less and less          

C. more and more ; less and less            

D. less and less; more and more

题型:填空题

下列情况中所采取的灭火方法,不正确的是(  )

A.炒菜时锅里的油着火,可用锅盖盖灭

B.电器设备失火,可用水浇灭

C.用液态二氧化碳灭火器扑灭图书档案的火灾

D.身上衣服着火时可就地打滚

题型:填空题

烘炉可用火焰烘炉、热风烘炉蒸汽烘炉等方法,以热风烘炉使用较多。( )

更多题库