期货公司每半年向公司全体股东提交的书面报告应当经期货公司法定代表人签字确认，并应当取

图1是示波管的原理图，它由电子枪、荧光屏和两对相互垂直的偏转电极XX'、YY'组成。偏转电极的极板都是边长为l的正方形金属板，每对电极的两个极板间距都为d。电极YY'的右端与荧光屏之间的距离为L。这些部件处在同一个真空管中。电子枪中的金属丝加热后可以逸出电子，电子经加速电极间电场加速后进入偏转电极间，两对偏转电极分别使电子在两个相互垂直的方向发生偏转。荧光屏上有xoy直角坐标系，x轴与电极XX'的金属板垂直（其正方向由X'指向X），y轴与电极YY'的金属板垂直（其正方向由Y'指向Y）。已知电子的电量为e，质量为m。可忽略电子刚离开金属丝时的速度，并不计电子之间相互作用力及电子所受重力的影响。

（1）若加速电极的电压为U₀，两个偏转电极都不加电压时，电子束将沿直线运动，且电子运动的轨迹平行每块金属板，并最终打在xoy坐标系的坐标原点。求电子到达坐标原点前瞬间速度的大小；

（2）若再在偏转电极YY'之间加恒定电压U₁，而偏转电极XX'之间不加电压，求电子打在荧光屏上的位置与坐标原点之间的距离；

（3）（i）若偏转电极XX'之间的电压变化规律如图2所示，YY'之间的电压变化规律如图3所示。由于电子的速度较大，它们都能从偏转极板右端穿出极板，且此过程中可认为偏转极板间的电压不变。请在图4中定性画出在荧光屏上看到的图形；

（ii）要增大屏幕上图形在y方向的峰值，若只改变加速电极的电压U₀、YY'之间电压的峰值U_y、电极XX'之间电压的峰值U_x三个量中的一个，请说出如何改变这个物理量才能达到目的。

中 * * 在《中央关于日本帝国主义强占满洲事变的决议》指出：“党在这次事变中的中心任务是：……领导群众（为）反对日本帝国主义的暴力政策，反对帝国主义的奴役和侵略，反对进攻苏联和苏区，拥护苏维埃，武装保卫苏联，反帝国主义的强盗战争而争斗。”为此，中 * * [ ]

A．依靠东北军坚持东北地区抗日武装斗争

B．组织了“黑龙江省民众抗日救国义勇军”

C．派遣大批优秀干部组织东北抗日游击队

D．制定了建立抗日民族统一战线的策略方针

It was the old lady’s eightieth birthday. She was sure Myra wouldn’t forget her mother’s birthday, even if she was busy. After all, eighty was a special birthday. Perhaps Myra might come. Even if Myra did not come, she would send a present. The old lady was sure of that. Two spots of colour brightened her cheeks. She was excited like a child.

Mrs. Morrison had brought a card and a bunch of flowers when she came to do the breakfast. Mrs. Grant downstairs had made a cake. Johnnie, the little boy next door, was now up with her with a packet of sweets.

“I guess you’ll get lots and lots of presents, ” he said. “I did last week when I was six.”

What would she like? A pair of slippers, perhaps. A blue new cardigan(羊毛衫). Or a table lamp. Or a little clock, with clear black numbers. So many lovely things.

She stood by the window, watching. The postman turned round the corner on his bicycle. Her heart beat fast. Johnnie had seen him too and ran to the gate.

“Granny, granny, ” Johnnie returned. “I’ve got your post!”

He gave her four envelopes. Three were from old friends. The fourth was in Myra’s writing.

“No parcel(包裹), Johnnie?”

“No, granny.”

Almost reluctantly, she tore the fourth envelope open. Folded in the card was a check. Written on the card was a message: Happy Birthday—Buy yourself something nice with the check, Myra and Harold.

The six-figure check fell to the floor like a bird with a broken wing. Slowly the old lady bent to pick it up. Her present, her lovely present. With trembling fingers she tore it into little bits.

小题1:As can be inferred from the passage, _______.

A．the old lady lived alone in a flat away from her daughter

B．the friends sent the old lady many lovely presents by post

C．Myra was stopped by her husband from seeing her mother

D．the neighbours cared little about the old lady in daily life小题2:The old lady expected her daughter most __________.

A．to send her a present.

B．to send her a check.

C．to come back home to celebrate her birthday.

D．not to return home.小题3:The old lady felt _______ when she saw no parcel came with her daughter’s card.

A．excited

B．happy

C．disappointed

D．impatient小题4:Which of the following might serve as the best title for the passage?

A．The Present

B．The Check

C．The Birthday

D．The Daughter小题5:The reason why the old lady tore the check into small pieces was that _______.

A．she was sure her daughter would come, not the check

B．she didn’t notice there were six figures on the check

C．she didn’t think the check was large enough for a present

D．she would prefer a present with love from her daughter

下列是大自然实木竞争产品（）。

A、圆盘豆、非州格木、任嘎漆木

B、榄仁木、铁线子、铁苏木

C、重蚁木、纽敦豆、山桂花

D、山茶荷木、马蹄荷、萼叶茜木