问题 选择题

当太阳直射在120°E经线上,121 °E 的地方时是

A.12时

B.12时4分

C.11时56分

D.12时15分

答案

答案:B

本题考查地方时计算。太阳直射在120°E经线上即120°E为12时,而121°E较120°E东面1°,故地方时早4分钟,则为12时4分。

选择题

Monty Robert’s father was a horse trainer. As a child, Monty often went from one farm to another with his father. Sometimes they didn’t have money to pay for food, but Monty still kept hoping to own a horse farm.

When he was in school, his teacher asked him to write a paper about his dream. He wrote a seven-page(页)paper. He wanted to have a horse farm one day. He even drew a picture of a horse farm in the paper.

The next day he handed it in to his teacher. Two days later, he got his paper back. On the front page was a large red “F” with the words “See me after class”. So the boy did and asked his teacher, “Why did I get an F?” The teacher said, “This dream will not come true for a young boy like you. You need a lot of money to own a horse farm. You have to buy the land. You have to pay for a lot of things. There is no way you could ever do it.” Then the teacher added, “If you write this paper again with a simpler dream, I will give you a good grade.”

After school he thought hard about it. At last, he decided to hand in the same paper, making no changes at all. He said to the teacher, “You can keep the F and I’ll keep my dream.”

Many years later, Monty had his own large horse farm. His dream came true.

So don’t let anyone take away your dreams. Follow your dreams, no matter what they are.

小题1:From Paragraph 1, we learn that _________.

A.Monty’s family was poor

B.Monty’s father didn’t support him

C.Monty hoped to be a horse trainer

D.Monty changed his mind all the time小题2:What was Monty’s attitude towards his paper?

A.Careless.

B.Serious.

C.Joking.

D.Funny.小题3:Monty’s teacher gave him a red “F” because he thought _________.

A.Monty’s handwriting was too bad

B.Monty copied from another student

C.Monty’s dream was too hard for him to achieve

D.Monty was not working hard to realize his dream小题4:What does the story want to tell us?

A.Don’t take away others’ dreams.

B.Follow a realistic dream.

C.Never give up your dream.

D.Anyone with a dream will succeed.

问答题

阅读材料,完成下例问题.

圆形的水滴

小明早晨在上学的途中发现停留在树叶上的露珠都是圆圆的.

他把这一现象告诉了小红,小红兴奋地说:“对,我也发现了.还有自来水开关里滞留着的水滴也是呈圆形落下来的.”

小明说:“水滴为什么呈圆形呢?”

他们查阅、分析了大量有关资料.

得知:水滴的表面被一层看不见的绷紧的表皮覆盖着.在水的里面,每个分子都受到来自周围各个方向的同样大小的力的牵拉.但是在水面上,和空气接触的方向没有拉力的作用.也就是说,只有朝水的内侧拉的力在起作用.这个力会使水面变小,所以水滴就变圆了.有些体重较轻的小动物和昆虫可以在水面上行走,就是利用了水的表面张力.

这激起了两人的好奇心,他们想:水的表面张力会被破坏吗?

小明认为会,小红则表示怀疑.

于是他们决定用实验来检验.先在脸盆上倒上水,在水面上放几个用电光纸剪成的小人.然后拿一块肥皂接触水面中心,小人立刻向四周散开.

为什么会这样呢?原来,肥皂和洗涤剂中含有碱,它们能破坏水的表面张力.当肥皂溶于水后,这部分肥皂水的表面张力突然减小,于是小人就向着表面张力大的方向移动.

(1)根据你刚才的阅读,将空格补充完整.

表面张力是液体内部的分子把表面层分子向______拉的力所引起的,表面张力使水的表面尽可能的变______,最后成______形的.

(2)用铝箔剪一艘小船,在铝箔上钻一小孔,将一小块肥皂插进小孔,把船放进干净的水里,小船就会向前进,你能解释一下其中的道理吗?

答:当肥皂溶于水后,改变了水的______,于是小船就向着______变______的方向移动.如果水面比较大,表面张力的大小不一致到一致需要较长时间,因此小船就可以在水面上行进许久.