5. Bob thought he ______ a “hobby”. He liked ______ his brother collecting.

(2)

John,

I’ll be home late tonight. I have to stay for a business meeting after work. Will you please pick up my jacket from the dry cleaner? The children are at Mother’s. Pick them up there. Could you give them their bath and make dinner for them? Don’t wait for me for dinner. I don’t know what time the meeting will end. And please don’t forget to buy some bread, milk and a little fuller at the supermarket. We don’t have any.

Love,

Sue

This is a (1) ______ from Sue to John. Sue is John’s (2) ______. One day Sue had to stay for a meeting and couldn’t go home for (3) ______. The children were at their (4) ______ home. So Sue wrote to tell John to do some (5) ______. He would go and get the children (6) ______ first then he would (7) ______ some bread, milk and (8) ______ the children to take a bath. She didn’t tell John how long the meeting would (9) ______ because she didn’t (10) ______ when the meeting would be over.

(3)

I will never forget the lesson which Mr Li gave us. One day Mr Li was speaking to us in our school meeting room. He began his speech by holding up a ¥100 bill. He asked, “Who would like this ¥ 100 bill?” Most of us put up our hands quickly. Then he said, “I am going to give this ¥ 100 to one of you, but first let me do this.” He then made the bill into a ball and said, “Who wants it now?” We raised our hands again. But he said, “Wait a moment.” He then dropped it on the floor and stepped on it. After that, he picked up the dirty bill and said, “Who still wants it?” Many hands were still up. “My friends,” he said, “you have learned a valuable lesson today. No matter what I did to the money, you still wanted it because it did not go down in value. It was still worth ¥100!”

“We always lose many chances we take in our lives.” He went on speaking, “We feel as if we are worth nothing. But remember, no matter what has happened to you, you will never lose your value, you are always valuable to those people who love you. Your value doesn’t come from what you do or who you know, but WHO YOU ARE.”

“You are special and valuable. Don’t ever forget it!”

4. The things in ______ hand were ______ his but his brother’s.

3. When Bob ______ to his classroom, he brought many beautiful ______.

2. Bob was so______ that his classmates didn’t ______ he could have a hobby.

1. All the students ______ the whole morning in ______ready for the hobby show.

38．(8分)[物理一物理3-5]

(1)大量氢原子处于不同能量激发态，发生跃迁时放出三种不同能量的光子，其能量值分别是：1.89eV、10.2eV、12.09eV。跃迁发生前这些原子分布在 　　　个激发态能级上，其中最高能级的能量值是　　 eV(基态能量为－13.6eV)。

(2)如图所示，滑块A、C质量均为m，滑块B质量为m。开始时A、B分别以v₁、v₂的速度沿光滑水平轨道向固定在右侧的挡板运动，现将C无初速地放在A上，并与A粘合不再分开，此时A与B相距较近，B与挡板相距足够远。若B与挡板碰撞将以原速率反弹，A与B碰撞将粘合在一起。为使B能与挡板碰撞两次，v₁、v₂应满足什么关系?

2010年普通高等学校招生全国统一考试(山东卷)

37．(8分)[物理一物理3-4]

　 (1)渔船常利用超声波来探测远处鱼群的方位。已知某超声波频率为l.0×105 Hz，某时刻

　 该超声波在水中传播的波动图象如图所示。

　 ①从该时刻开始计时，画出x=7.5 ×10-3m处质点做简谐运动的振动图象(至少一个周期)。

　 ②现测得超声波信号从渔船到鱼群往返一次所用时间为4s，求鱼群与渔船间的距离(忽略船和鱼群的运动)。

(2)如图所示，一段横截面为正方形的玻璃棒，中间部分弯成四分之一圆弧形状，一细束单色光由MN端面的中点垂直射入，恰好能在弧面EF上发生全反射，然后垂直PQ端面射出。

①求该玻璃棒的折射率。

②若将入射光向N端平移，当第一次射到弧面EF上时　　　　 (填“能”“不能”或“无法确定能否”)发生全反射。

36．(8分)[物理一物理3-3]

　　 一太阳能空气集热器，底面及侧面为隔热材料，顶面为透明玻璃板，集热器容积为V₀，开始时内部封闭气体的压强为p₀。经过太阳曝晒，气体温度由T₀=300K升至T_l=350K。

　　 (1)求此时气体的压强。

(2)保持T₁=350K不变，缓慢抽出部分气体，使气体压强再变回到p₀。求集热器内剩余气体的质量与原来总质量的比值。判断在抽气过程中剩余气体是吸热还是放热，并简述原因。

25．(18分)如图所示，以两虚线为边界，中间存在平行纸面且与边界垂直的水平电场，宽度为d，两侧为相同的匀强磁场，方向垂直纸面向里。一质量为m、带电量+q、重力不计的带电粒子，以初速度v，垂直边界射入磁场做匀速圆周运动，后进入电场做匀加速运动，然后第二次进入磁场中运动，此后粒子在电场和磁场中交替运动。已知粒子第二次在磁场中运动的半径是第一次的二倍，第三次是第一次的三倍，以此类推。求

(1)粒子第一次经过电场的过程中电场力所做的功W₁。

(2)粒子第n次经过电场时电场强度的大小E_n。。

(3)粒子第n次经过电场所用的时间t_n。

(4)假设粒子在磁场中运动时，电场区域场强为零。请画出从粒子第一次射入磁场至第三次离开电场的过程中，电场强度随时间变化的关系图线 (不要求写出推导过程，不要求标明坐标刻度值)。

[选做部分]

24．(15分)如图所示，四分之一圆轨道OA与水平轨道AB相切，它们与另一水平轨道CD在同一竖直面内，圆轨道OA的半径R=0.45m，水平轨道AB长s₁=3m，OA与AB均光滑。一滑块从O点由静止释放，当滑块经过A点时，静止在CD上的小车在F=1.6N的水平恒力作用下启动，运动一段时间后撤去力F。当小车在CD上运动了s₂=3.28m时速度v=2.4m／s，此时滑块恰好落入小车中。已知小车质量M=0.2kg，与CD间的动摩擦因数μ=0.4。(取g=10m／s²)求

(1)恒力F的作用时间t。

(2)AB与CD的高度差h。