摘要:1 2 3 4 5 6 7 D D C B C D A 8 9 10 11 12 13 14 D C C C A D A
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8个相同的水瓶中灌入不同高度的水,对着瓶口吹,可以发出“1、2、3、4、5、6、7、1”的声音来.这些声音产生的原因和决定音调的因素分别是
- A.水振动,水的高度
- B.水振动,瓶内空气柱的高度
- C.瓶内空气振动,水的高度
- D.瓶内空气振动,瓶内空气柱的高度
8个相同的水瓶中灌入不同高度的水,对着瓶口吹,可以发出“1、2、3、4、5、6、7、1”的声音来.这些声音产生的原因和决定音调的因素分别是
[ ]
A.水振动,水的高度
B.水振动,瓶内空气柱的高度
C.瓶内空气振动,水的高度
D.瓶内空气振动,瓶内空气柱的高度
2011年3月11日14点46分,日本本州岛海域发生里氏9.0级地震,并引发海啸,瞬间扑向几乎日本全部沿海地区,继而造成日本福岛核电站核泄露,如图1所示.

(1)强烈地震全面瘫痪了日本震区的地面交通,利用卫星遥感技术可及时了解震区的受灾情况.如图1所示拍摄到的照片通过
(2)海啸时产生的“水墙”速度很大,具有很大的
(3)核电站是利用核能来发电的,目前核电站利用的核反应是
(4)为了给处于高温中的核反应堆外壳降温,消防员通过喷水的方法来有效降温,这是利用了水的
(5)福岛核事故达到了七级,使得大量的核燃料外泄,周围的人们处在核污染中.图2中是核辐射标志的是
(6)如果核电站每年需要50t的核燃料,而同等规模火电站每年需要6×106 t的煤炭.6×106 t的煤炭完全燃烧放出的热量是
(7)“能源和环境”是世界各国共同面临的问题,保护环境、节约能源要从我做起.下列说法中需要改正的是
A.尽可能用太阳能热水器代替电热水器
B.养成及时关掉水龙头和人走关灯的习惯
C.用洗脸水冲厕所,将废报纸、空酒瓶等送到废品收购站
D.及时将生活垃圾,废电池装在一起丢入垃圾箱.
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(1)强烈地震全面瘫痪了日本震区的地面交通,利用卫星遥感技术可及时了解震区的受灾情况.如图1所示拍摄到的照片通过
电磁波
电磁波
传回地面;(2)海啸时产生的“水墙”速度很大,具有很大的
动
动
能,破坏力很强;(3)核电站是利用核能来发电的,目前核电站利用的核反应是
裂变
裂变
(选填“裂变”或“聚变”);(4)为了给处于高温中的核反应堆外壳降温,消防员通过喷水的方法来有效降温,这是利用了水的
比热容
比热容
大的特性;(5)福岛核事故达到了七级,使得大量的核燃料外泄,周围的人们处在核污染中.图2中是核辐射标志的是
C
C
.(6)如果核电站每年需要50t的核燃料,而同等规模火电站每年需要6×106 t的煤炭.6×106 t的煤炭完全燃烧放出的热量是
1.8×1017
1.8×1017
J(煤炭的热值为3×107J/kg).(7)“能源和环境”是世界各国共同面临的问题,保护环境、节约能源要从我做起.下列说法中需要改正的是
D
D
.A.尽可能用太阳能热水器代替电热水器
B.养成及时关掉水龙头和人走关灯的习惯
C.用洗脸水冲厕所,将废报纸、空酒瓶等送到废品收购站
D.及时将生活垃圾,废电池装在一起丢入垃圾箱.
(1)小明将凸透镜正对太阳光,在透镜的另一侧移动光屏,直至屏上呈现出
(2)小华在凸透镜成像实验中,把蜡烛放在该凸透镜的焦点上,凸透镜固定不动,将光屏向远离凸透镜的方向移动的过程中,在光屏上观察到的现象是大小
(3)小莉同学做实验时,小华发现烛焰在光屏上的像如图1所示,若要使烛焰在光屏中心成像,只调节透镜,小莉应将透镜向
(4)小明将烛焰移至距凸透镜 15cm 处,移动光屏,使烛焰在屏上得到清晰的倒立、
(5)小莉同学将自己的近视眼镜镜片放在了蜡烛与凸透镜(靠近凸透镜)之间,小明移动透镜和光屏,直到在光屏上得到了一个倒立缩小的清晰的像.将近视眼镜镜片取下,发现光屏上的像变模糊了.
①为了使屏上的像重新变得清晰,在不移动蜡烛和凸透镜位置的前提下,小华应将光屏向
②下列四个选项中,正确表示小莉同学近视眼成像和近视眼矫正情况的是图2中的
A.乙 甲 B.丙 甲 C.乙 丁 D.丙 丁
(6)当烛焰通过凸透镜在光屏上成一实像时,如果小明用书遮挡住透镜下半部分,则实验时光屏上所成的像
(7)蜡烛通过凸透镜恰好在光屏上得到放大的清晰的像,若保持凸透镜的位置不变把蜡烛和光屏的位置对调,则光屏上
A.不能成像 B.可以成像,但要适当移动位置 C.可以成像,像大小不变 D.可以成像,像变小
(8)蜡烛通过凸透镜恰好在光屏上得到放大的清晰的像,若拿下光屏,移动眼睛的位置
(9)一物距应只有唯一的像距,他们三人将蜡烛都放在透镜前15厘米处时,但他们所测得的像距却并不相同,分别为28cm,30cm,31cm,他们的数据不是因为测量长度误差造成的,你认为出现这种现象的原因是
(10)小华又将两支点燃的蜡烛、凸透镜和光屏分别置于如图3所示的位置时,光屏上C、D两处会得到清晰的烛焰像.这像是
There was a boy who was sent by his parents to a boarding school (寄宿学校). 36 being sent away, this boy was the 37 student in his class. He was at the top in every 38 always with high marks.
But the boy changed after 39 home and attending the boarding school. His grades started 40 . He hated being in a 41 . He was lonely all the time. And there were especially dark times when he 42 committing suicide (自杀). All of this was because he felt 43 and no one loved him.
His parents started 44 about the boy. But they even did not know what was 45 with him. So his dad decided to travel to the boarding school and 46 him.
They sat on the bank of the lake near the school. The father started asking him some casual questions about his classes, teachers and 47 . After some time his dad said, “Do you know, son, why I am here today?”
The boy answered back, “To 48 my grades?”
“No, no,” his dad replied. “I am here to tell you that you are the most 49 person for me. I want to see you 50 . I don’t care about grades. I care about you. I care about your happiness. YOU ARE MY LIFE.”
These words 51 the boy’s eyes to be filled with tears. He 52 his dad. They didn’t say anything to each other for a long time.
Now the boy had 53 he wanted. He knew there was someone on this earth who cared for him deeply. He 54 the world to someone. And today this young man is in college at the top of his class and no one has ever seen him 55 !
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But the boy changed after 39 home and attending the boarding school. His grades started 40 . He hated being in a 41 . He was lonely all the time. And there were especially dark times when he 42 committing suicide (自杀). All of this was because he felt 43 and no one loved him.
His parents started 44 about the boy. But they even did not know what was 45 with him. So his dad decided to travel to the boarding school and 46 him.
They sat on the bank of the lake near the school. The father started asking him some casual questions about his classes, teachers and 47 . After some time his dad said, “Do you know, son, why I am here today?”
The boy answered back, “To 48 my grades?”
“No, no,” his dad replied. “I am here to tell you that you are the most 49 person for me. I want to see you 50 . I don’t care about grades. I care about you. I care about your happiness. YOU ARE MY LIFE.”
These words 51 the boy’s eyes to be filled with tears. He 52 his dad. They didn’t say anything to each other for a long time.
Now the boy had 53 he wanted. He knew there was someone on this earth who cared for him deeply. He 54 the world to someone. And today this young man is in college at the top of his class and no one has ever seen him 55 !
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