(7分) 小王同学在学习甲烷性质的有关知识后,查阅相关资料时惊奇发现,1体积甲烷

题型:填空题

问题:

(7分)

小王同学在学习甲烷性质的有关知识后,查阅相关资料时惊奇发现,1体积甲烷完全燃烧时消耗约10体积空气中的氧气!当氧气不足时,其产物除了水和二氧化碳外,还可能含有一氧化碳。请完成下列填空。

⑴写出甲烷( CH4)完全燃烧的化学方程式:      。

⑵家用天然气的主要成分也是甲烷,在使用天然气灶具时应注意调节灶具通风口的大小,以免      、      。

⑶化石能源是有限的最终会被耗尽,请写出一种你所知道的新能源      。

⑷“低碳生活”是指生活作息时所消耗的能量要尽力减少,从而降低二氧化碳的排放量。下列生活方式能体现这一理念的是       (填序号)。

a.随手关灯    b.鼓励多用私家车    c.节约用纸    d.拒绝使用一次性碗筷

考点:环境和能源酸雨燃料的利用和新能源的开发
题型:填空题

阅读理解。

  My name is Tony.I have a twin brother. Well, my twin brother is called

Daniel, and he is four minutes younger than me. We were both born on the 5th of

January, and I think that we look alike very much. Daniel is a little taller than me

and he has very dark hair, but we have the same eyes and nose and smile.We

weren't always in the same classes at school because my parents wanted us to be

a bit more different.We used to be dressed the same way, but different in color,

me in red and him in blue, and we used to have a birthday cake that was always

half was red and half was blue, but I guess we are quite different.He’s really,

really active, and just very different from me. At school I was always in the top

classes getting A's and he was always failing the exams. He did a lot of sports

but I didn’t, so people say we are very different.

1. When is their birthday?

________________________________________

2. Are there any differences between the twins?

________________________________________

3. Why weren’t they always in the same classes?

________________________________________

4. How were they dressed when young?

________________________________________

5. How is Tony different from his brother?

________________________________________

题型:填空题

与能量代谢无关的维生素是()。

A.硫胺素

B.维生素A

C.尼克酸

D.核黄素

E.以上都不对

题型:填空题

简述古代希腊民主政治产生的条件。

题型:填空题

下列句子中划线成语使用正确的一项是(    )(3分)

A.冬去春来,夏隐秋至,一年四季,周而复始,变化无常。

B.每逢节假日,中央大街两旁的店铺就会顾客盈门,生意葱茏

C.家中的相册里,总有一些年代久远的老照片,往往隐藏着一些鲜为人知的故事。

D.当老师在《致女儿的信》中提到爱情时,同学们都忍俊不禁地笑了。

题型:填空题

以下哪项不属于丙泊酚静脉麻醉的特点()

A.诱导过程血压、呼吸无影响

B.起效快

C.维持时间短

D.苏醒快

E.降低颅内压,降低脑血流和脑代谢率

更多题库