阅读下面这篇文章，回答下列各题。
粒子束武器
粒子束武器大致分为三个主要部分，即由能源、电子喷嘴和集流加速器组成。
能源，一般是靠核裂变或聚变的极高的脉冲功率形成。人们采用专门的核爆炸式的发电机，通过核裂变或聚变释放出大量的能量，发出高压脉冲电流。它通过控制开关和特殊传输线路在一瞬间传输给巨型贮能器，把脉冲电荷堆积起来，通过超高压开关在毫微秒计的时间内放电。
流量压缩装置和电子注入器把脉冲高压转换成电子束，高强电磁场把它在长长的电子枪中加速，通过电子嘴向集流加速器喷射，作为形成和加速质子的媒介。
集流加速器是粒子束的核心。在电子喷嘴和集流加速器之间，装有注入阀，引入Z质(如有一种加速器的Z质用氢气)，由于电子束的高速碰撞，电子被剥落，形成质子，并集流加速，最后接近光速发射出来，摧毁目标。
粒子束武器的简单工作过程是：通过核裂变或聚变的形式实现爆炸或脉冲发电，以产生高功率的脉冲粒子束，这些粒子束以接近光速的速度射向目标，击毁目标。
(选自《自然科学》14辑)
阅读下面这篇文章，回答下列各题。
粒子束武器
粒子束武器大致分为三个主要部分，即由能源、电子喷嘴和集流加速器组成。
能源，一般是靠核裂变或聚变的极高的脉冲功率形成。人们采用专门的核爆炸式的发电机，通过核裂变或聚变释放出大量的能量，发出高压脉冲电流。它通过控制开关和特殊传输线路在一瞬间传输给巨型贮能器，把脉冲电荷堆积起来，通过超高压开关在毫微秒计的时间内放电。
流量压缩装置和电子注入器把脉冲高压转换成电子束，高强电磁场把它在长长的电子枪中加速，通过电子嘴向集流加速器喷射，作为形成和加速质子的媒介。
集流加速器是粒子束的核心。在电子喷嘴和集流加速器之间，装有注入阀，引入Z质(如有一种加速器的Z质用氢气)，由于电子束的高速碰撞，电子被剥落，形成质子，并集流加速，最后接近光速发射出来，摧毁目标。
粒子束武器的简单工作过程是：通过核裂变或聚变的形式实现爆炸或脉冲发电，以产生高功率的脉冲粒子束，这些粒子束以接近光速的速度射向目标，击毁目标。
(选自《自然科学》14辑)
| 请根据下面和短文回答下面各题。 Some people say that they never have dreams. But that is not true. Everybody has dreams, but some people just have a better memory for them than others. Every one and a half hours in the whole night we enjoy our free time in our dreams. We can forget the good behaviour of the day and we are free to act in almost any way we like. Things from our past and things from now we come together. But as soon as we wake, the dream is gone, and the more we try to remember the things in the dream, the more we forget. "I had a dream last night. I must tell you about it. I was in my old school, but it wasn’t a school, it was a kind of a ... er ... I really don’t know what it was." So, why do we dream Are dreams important The experts tell us that they are important, because they can help us get ready for the problems of everyday life. The [单项选择]请根据下面的短文回答下面各题
Once there lived an old man in a town. He always forgot a lot of things. So his wife always had to say to him, "Don’t forget this." One day he went on a long trip alone. Before he left home, his wife said, "Now you have all these things. They are what you need for your trip. Take care of your things during the trip." He went to the station. He bought a ticket and got on the train with it. About an hour later, the conductor began to see the tickets. He came to the old man and said, "Will you please show me your ticket " The old man looked for his ticket in all his pockets, but he could not find it. He was very worried. "I can’t find my ticket. I really bought a ticket before I got on the train." said the old man. "I think you are right. I believe you bought a ticket. All right. You don’t have to buy another ticket," said the conductor kindly. But the old man still looked worried and said sadly, "You don’t know why I’m worried. If I don’t find m A. Whether the old man went on the trip with his wife B. Whether the old man found his ticket. C. Whether the conductor believed the old man. 我来回答: 提交
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