.以下关于熔化和凝固的说法中哪个正确() A.同一种晶体的熔化温度比它的凝固温度

题型:选择题

问题:

.以下关于熔化和凝固的说法中哪个正确     (    )

A.同一种晶体的熔化温度比它的凝固温度高图B2-4

B.非晶体没有一定的熔点,但有一定的凝固点

C.晶体在熔化过程中要吸热,但温度不变

D.晶体在熔化过程中,温度不变,所以不吸热

考点:凝固现象熔化现象
题型:选择题

A teacher let her class play a game. The teacher told each child to bring a bag with some potatoes. Each potato would be given a name of a person that the child hated, so the number of potatoes in his/her bag would depend on the number of people the child hated. Some children had two potatoes, some had three and others had up to five potatoes. The teacher then told the children to carry the bag wherever they went for a week. After a week, the teacher asked, ”How did you feel?” The children started complaining about the unpleasant smell coming from the rotten potatoes when they had to carry the heavy and smelly potatoes everywhere they went.

Then the teacher said,” This is the same when you carry your hate for somebody inside your heart. The smell of hate will pollute your heart and you will carry it with you wherever you go. If you cannot bear the smell of rotten potatoes for just one week, can you imagine what it is like to have the smell of hate in your heart for your lifetime?”

小题1: Tom had two potatoes in his bag .It means he had ______ persons he didn’t like.

A.two

B.four

C.three

D.five小题2: In the game, the students should _________.

A.keep the bag of potatoes in the classroom

B.carry the bag of potatoes everywhere they go

C.leave the bag of potatoes at home

D.count the bag of potatoes every day小题3:The underlined word “rotten” most probably means ___________ in Chinese.

A.美味的

B.新鲜的

C.甜的

D.腐烂的小题4: According to the last paragraph, we can learn that ________.

A.potatoes are very important to the students

B.hating others can make the life unhappy

C.the smell of hate is good for our health

D.the students like to carry the bag of the potatoes小题5: Which is the best title of this passage?

A.An interesting game

B.Carry the smelly potatoes

C.The rotten potatoes

D.To excuse others is to excuse yourself

题型:选择题

8051单片机有两个外部中断源,当应用系统需要第三个外部中断,可以采用的方法为()等。

题型:选择题

综合性学习活动。

  年级举行“小记者访广州亚运”活动,假设你担任“小记者访广州亚运”小分队的队长,请你完成下列任务。

(1)队旗上需有一副对联,上联是“亚洲健儿聚羊城”,请你拟出下联:_______________

(2)曾经在北京奥运退赛的刘翔跑出13秒09的好成绩,实现亚运会110米栏三连冠。假如你采访刘翔,小分队准备在一块丝绸上绣上四个字作为礼物现场赠给他,你准备绣哪四个字?请把这四个字写在后面的横线上。_______________

(3)现场采访刘翔时,你准备问哪两个问题?

①_______________________________________

②_______________________________________

题型:选择题

习作的特殊能力包括()。

A.思考力

B.收集材料的能力

C.观察力

D.审题与立意的能力

E.选择和组织材料的能力

题型:选择题

升级版PLA智能泊车辅助系统前共有()个探测传感器。

A.6

B.8

C.10

D.12

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