炎热的夏天,在阳光的烧灼下,柏油公路会变软,这一现象说明( ) A.柏油是非晶体

题型:选择题

问题:

炎热的夏天,在阳光的烧灼下,柏油公路会变软,这一现象说明(  )

A.柏油是非晶体,没有一定的熔点,受热后逐渐变软

B.柏油是晶体,受热后未达到熔点,先变软

C.柏油是晶体,受热后达到熔点,已经开始熔化

D.柏油的硬度不够,不能确认柏油是晶体还是非晶体

考点:晶体和非晶体
题型:选择题

阅读理解。

     The summer vacation is over. It's true that time always flies fast. During the vacation, the weather was

hot and I could not do much work, but I lived happily.

    As the afternoon was hot, I did my work in the morning. I used to get up at 6:30 and take a walk in the

garden for half an hour. After breakfast, I began reading English and Chinese and did some exercises in maths.

Those took me three hours or more. I worked quite hard and made good progress (取得进步).

    I spent the afternoon outside. I went to swim and it was funny. I would not go home until it was about

five or six o'clock. Sometimes a friend of mine would come to see me and we would spend some hours

listening to music.

    In this way I spent my vacation happily. And I not only studied well but also became a good swimmer.

Now I am in good health and high spirits (精神).

1. What does the text mainly tell us? [ ]

A. How the writer spent his summer holidays.

B. What the weather was like in that summer.

C. When the writer got up in the morning.

D. Where the writer took a walk.

2. How long did it take the writer to do his homework? [ ]

A. Half an hour.

B. Three hours or more.

C. Only one hour.

D. Two hours and a half.

3. The writer spent most of the afternoon ______. [ ]

A. listening to music

B. visiting his friends

C. walking in the garden

D. swimming

4. The writer had very good summer holidays because he ______. [ ]

A. worked very hard and made good progress

B. learned to swim and did his work well

C. got up early and went home late

D. liked swimming better than studying

5. Which of the following is NOT true? [ ]

A. The writer made progress in his lessons.

B. The writer took a walk for half an hour before breakfast.

C. The writer began studying as soon as he got up.

D. The writer spent more time swimming than listening to music.

题型:选择题

纳税人不进行纳税时,不缴或者少缴应纳税款的,应承担哪些法律责任?

题型:选择题

阅读。

  蚊子飞到狮子面前,对他说:“我不怕你,你并不比我强。要说不是这样,你到底有什么力量呢?是用爪子抓,牙齿咬吗?女人同男人打架,也会这么干。我比你强得多。你要是愿意,我们来较量较量吧!”蚊子吹着喇叭冲过去,朝狮子脸上专咬鼻子周围没有毛的地方。狮子气得用爪子把自己的脸都抓破了。蚊子战胜了狮子,又吹着喇叭,唱着凯歌飞走,却被蜘蛛网粘住了。蚊子将要被吃掉时,叹息说,自己同最强大的动物都较量过,不料却被这小小的蜘蛛消灭了。这个故事适用于________________________________。

1.解释下列词语,并说说他们的表现作用。

A.较量较量:________________,这个词语表现出蚊子________________________的神情。

B.凯歌:________________________,这个词表现出蚊子________________________的神情。

2.“要说不是这样”中的“这样”指代的是________________。

3.用自己的话概括蚊子战胜狮子的主要原因是________________。

4.文中在描写蚊子叫声时用了两个不同的词,分别是________、________。

5.“你并不比我强”和“我比你强得多”分别是________句和________句,从句子的语气上来看,第______句比第______句强。

6.文中写狮子与蚊子的“战斗”时主要运用了________和________的描写手法。

A.对话描写

B.语言描写

C.动作描写

D.神态描写

E.心理描写

7.在文中最后一节横线上填上相应的句子。

_______________________________________________

题型:选择题

下列物质的分子中,不具有对称性的是(  )。

A.CH3Cl

B.CH2Cl2

C.CH2ClBr

D.

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简述品种抗性鉴定方法?

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