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一群处于n＝3激发态的氢原子向基态跃迁，发出的光以相同的入射角θ照射到一块平行玻璃砖A上，经玻璃砖A后又照射到一块金属板B上，如图所示，则下列说法正确的是：

A．入射光经玻璃砖A后会分成相互平行的三束光线，从n＝3直接跃迁到基态发出的光经玻璃砖A后的出射光线与入射光线间的距离最大

B．在同一双缝干涉装置上，从n＝3直接跃迁到基态发出的光形成的干涉条纹最窄

C．经玻璃砖A后有些光子的能量将减小，有些光在玻璃砖的下表面会发生全反射

D．若从n＝3能级跃迁到n＝2能级放出的光子刚好能使金属板B发生光电效应，则从n＝2能级跃迁到基态放出的光子一定能使金属板B发生光电效应

中国有一座城市，它曾经是最早开放的通商口岸之一，无产阶级在这里首先登上政治舞台，中国从这里开始踏上革命征程，这座城市是

A．上海    B．重庆 　   C．天津    　D．北京

小明同学学习了燃料的热值后，考虑到燃料燃烧放出的热量会被水吸收，而水的比热已知．（注：燃料完全燃烧放热用Q放=mq计算，某燃料的热值用q表示；其质量用m表示）．自己设计一个实验来探究煤油和菜籽油的热值的大小关系．他组装了图10所示的装置进行实验，记录结果见下表：

燃料	加热前的水温/℃	燃料燃尽后水温/℃
煤油	25	44
菜籽油	25	34

                                                              

（1）为了保证实验结论的可靠，小明同学选择了两套相同装置，在实验中还应控制：煤油和菜籽油的     相同及      相同。

（2）分析得出：煤油和菜籽油两种燃料中，热值较大的是                          。

（3）小明同学还想利用这种实验方案计算出煤油和菜籽油的热值，那么小明还需要补充的实验仪器是        。利用此实验方法计算出的热值将比真实值     （偏大/偏小）．说说你的看法。                                              

英译汉
1. That is Mary.
____________________________________________
2. Who’s that boy?
____________________________________________
3. Look at the skirt.
____________________________________________
4. It’s a bird.
____________________________________________
5. Which class are you in?
____________________________________________

根据短文内容回答问题。
Ben is very happy today. He goes to the park at eight thirty. He plays football with friends at ten. At eleven forty-five, he goes to the restaurant with his parents. Ben goes to the movie theater at five o’clock, at six thirty, he goes home.
1.Yes or No.
( ) (1) Ben goes to the park at six thirty.
( ) (2) Ben goes to the restaurant with his grandma.
( ) (3) At five o’clock, Ben goes to the movie theater.
2.Answer the questions.
(1) What time does Ben play football?
___________________________________ .
(2) Is Ben happy today?
___________________________________ .

世界上最早的兵书是                             　　　　　　　　（    ）

A、《孙子兵法》   B、《孙膑兵法》　　C、《三十六计》   D、《韩非论战》

下列叙述正确的是

A．含有AgCl和AgI固体的悬浊液：c(Ag^＋)＞c(C1^－)＝c(I^－)

B．在含有BaSO₄沉淀的溶液中加入Na₂SO₄固体，c(Ba^2＋)增大

C．AgCl在同浓度的CaCl₂和NaCl溶液中的溶解度相同

D．CaCO₃ 难溶于稀硫酸，但可溶于醋酸

 用如图14所示的滑轮组去拉物体，已知物质的密度是2 ×10³kg／m，底面积是0.3m²，重力为600N。物体在F=100N的拉力作用下，沿水平方向匀速前进了2m。(g取10N／kg)求：

(1)物体对水平地面的压强是多少?

(2)物体的体积是多大?

(3)若该装置的机械效率为80％，物体在水平方向上受到的阻力是多少？

许多家庭的门上都装有防盗门镜(俗称“猫眼”)。从室内透过防盗门镜向外看，可以看到来客正立、缩小的像。由此可以判断，此防盗门镜的作用相当于一个：

   A．凸透镜    B．凹透镜    C．三棱镜    D．玻璃砖

有短周期元素A、B、C、D、E，

已知：①常温下，A元素的单质在空气或浓硫酸中，表面都能生成致密的氧化膜；

②B元素的原子序数比A元素大，其原子的次外层的电子数是最外层电子数的2倍；

③E与A同周期，C、D、E三种元素形成的单质或化合物可发生如图所示的反应．

请回答下列问题：

（1）写出A元素最高价氧化物与NaOH溶液反应的离子方程式：　　；

（2）D元素的原子结构示意图是：　　；

（3）B元素与E元素的最高价氧化物的水化物的酸性强弱（用化学式表示）：　　＞　　；

（4）请用化学方程式表示E元素的单质在工业上的一种重要用途：　．

    Aging brings wrinkles, sagging bodies and frustrating forgetfulness. But getting older is not all bad for many people. Mounting evidence suggests aging may be a key to happiness. There is conflicting research on the subject, however, and experts say it may all boil down to this: Attitude is everything.

Older adults tend to be more optimistic and have a more positive outlook on life than their younger and stressed opposites. The big question is why seniors are happier. A recent study suggests one reason: Older adults remember the past through happy memories. Aging can bring more cheer as people become more comfortable with themselves and their roles in society. The older adults said they were enjoying more time with their family, spending more time on hobbies and having greater financial security and did not have to work.

But others are doubtful about the link between happiness and growing older.

"The notion that those in old age are happiest is misleading," said Richard Easterlin, a professor of economics at the University of Southern California. "It is based on comparing people of different ages who are the same in terms of income, health, family life." Easterlin added, "When you take account of the fact that older people have lower income than younger, are less healthy, and more likely to be living alone, then you will find it hard to accept that they are happier.

In fact, scientists have found that as people age, their health declines and social networks disappear as their friends die, which can make the elderly less happy.

Even if one does give in to age's dark side, health and happiness don't always go hand-in-hand. It's all about attitude. Research by the University of Chicago’s Yang suggests that attitude about life and happiness, is partly shaped by the era in which a person was born. It turns out that individuals who adapt the best to changes also have the highest expected levels of happiness.

Despite the conflicting findings about aging and happiness, the good news is that there doesn’t appear to be a limit to how much happiness one can achieve in one’s life. “Most people desire happiness,” Easterlin said. “To my knowledge, no one has identified a limit to attainable happiness.”

32. What does the last paragraph mainly tell us?

A. The key factor to older adults’ happiness

B. There is a conflict between aging and happiness

C. No one can define the limit to happiness.

D. The relationship between health and happiness.

33. Why are some seniors happier according to some experts?

A. They focus on what makes them feel good.

B. They have their own circle of friends.

C. They have better income after retirement.

34. What can we learn from the passage?

A. People of the same age have the same sense of happiness.

B. Attitude may play a very important role in happiness.

C. People who adapt the best to changes are more likely to be unhappy.

D. Older adults who have more valuable life experience are more optimistic.

35. What’s the topic discussed in the passage?

A. Whether aging or attitude brings happiness.

B. Why seniors adapt the best to changes in society.

C. What the limit to an elder person’s happiness is.

D. How older people feel compared with younger people.

学好化学，提高生活质量。下列说法不正确的是

A ． 腌制咸鸭蛋利用了半透膜的渗析原理

B ． 夏日的傍晚常常看到万丈霞光穿云而过美不胜收与胶体的性质有关

C ． 病人在服用胃舒平 ( 主要成分为氢氧化铝 ) 期间可以多吃酸性食物

D ． 食物腐败、植物光合作用都与氧化还原反应有关

正方形的周长一定是它边长的4倍。（_______）

下列关于中国民族资本主义发展的叙述，正确的是（  ）

①经历了近90年的发展史      ②是中国近代社会进步的基础    ③始终受到反动政府的阻碍和限制    ④外国对华经济侵略对其发展有阻碍和促进的双重作用
    A．①②③④　　　　 B．②③④　　　　　 C．①②④　　　　   D．①②③

当前世界上天然橡胶和油棕的最大产区在

A．撒哈拉以南非洲    B．拉丁美洲    C．南亚    D．东南亚

3个一和1个十组成31。（____）

餐桌上饮品丰富，下列饮品中属于溶液的是

A ． 玉米糊 B ． 豆浆 C ． 可乐 D ． 牛奶

历史老师制作了一则谜语，谜面是：迁都洛阳、汉化政策、民族融合(打一历史事件)。这则谜语的谜底应是(   )

A．商鞅变法     B．北魏孝文帝改革     C．文成公主入藏     D．土尔扈特回归祖国

某课外活动小组为探究实验室制取氢气的方案，分别用金属A、B两种不同金属与质量相同、溶质质量分数相同的稀硫酸反应，经实验发现：生成氢气的质量与反应时间有下

图所示关系。分析图像得到的以下结论中，不合理的是

A．反应得到氢气的质量相等                           

B．两种金属已完全反应，稀硫酸有剩余

C．两种金属的活动性A >B               

D．反应后所得溶液的溶质质量分数A >B