图乙为一台小型发电机构造示意图，线圈逆时针转动，产生的电动势随时间变化的正弦规律

Sometimes people are not clear about what kind of food is healthy, and what kind of food may do harm to our health. The USDA has prepared a food guide to help people learn about which kind of food is the healthiest to eat. The food guide describes six main food groups: meat (like fish and chicken), dairy (like milk and cheese),grains (like bread and rice), fruit and vegetables. The last group is fats and sweets. The USDA also suggests how much of each food group is healthy to eat daily. Though this guide was prepared by the US government, it is very useful for people all over the world.

As a result of years of study, we know that too much animal fat is bad for our health. For example, Americans eat a lot of meat and only a small amount of grains, fruit and vegetables. Because of the way they eat, they have a high rate of cancer and heart disease. In Japan, people eat large amounts of grains and very little meat. The Japanese also have a very low rate of cancer and heart disease. The Japanese live longer than anyone else in the world. However, when Japanese people move to the US, the rate of heart disease and cancer goes up as their eating habit changes. And as hamburgers, ice creams and other high-fat foods become popular in Japan, the rate of heart disease and cancer is going up there as well. People are also eating more meat and dairy food in other countries, in which the disease rate is going up along with the change of the way people eat. Doctors everywhere suggest people eat more grains, fruit and vegetables and less meat and dairy food.

Eating healthily is important for children as well as their parents. When parents have poor eating habits, their children usually do, too. After all, children eat in the same way as their parents. When parents eat healthy food, the children will learn to enjoy it, too. Then they will develop good eating habits. Doctors suggest parents give their children healthier food such as fruit, vegetables and juice.

Everyone wants to live a long, healthy life. We know that the food we eat affects us in different ways. For example, doctors believe that fruit and vegetables can really protect people from many different diseases. On the other hand, animal fat can cause diseases. We can change our eating habits now and enjoy many years of healthy living.

小题1:What is the USDA in the passage?

A．A group of doctors in the US.

B．An office of the US government.

C．A report on diseases in the US.

D．An order given by the US President.小题2:What does the underlined word “result” mean in Chinese?

A．结果

B．论文

C．仪器

D．程序小题3:The second paragraph mainly tells us that __________.

A．Japanese are always healthier than Americans

B．living in the US is not good for people’s health

C．if you eat too much fat you will have cancer

D．the way we eat may cause some health problems小题4:The greatest help the passage gives us is __________.

A．to introduce a food guide to the world

B．to suggest a way of eating for a healthy life

C．to find the main cause of some serious diseases

D．to provide us with knowledge of six food groups

科技馆里有一个展品，该展品放在暗处，顶部有一个不断均匀向下喷射水滴的装置，在频闪光源的照射下，可以看到水滴好像静止在空中固定的位置不动，如图所示．某同学为计算该装置喷射水滴的时间间隔，用最小刻度为毫米的刻度尺测量了空中几滴水间的距离，由此可计算出该装置喷射水滴的时间间隔为（g取10m/s²）（　　）

A．0.01s

B．0.02s

C．0.1s

D．0.2s

将正整数按如图所示的规律排列下去，若用有序实数对（n、m）表示第n排，从左到右第m个数，如（4、3）表示实数9，则（7、2）表示的实数是（        ）。

读下图，回答问题。（11分）

（1）第十一届全国人民代表大会第五次会议和第十一届政协全国委员会第五次会议，分别于2012年3月5日­—14日和3月3日—13日在北京召开。由此说明北京的城市职能之一是（ ）（1分）

A．全国的政治中心

B．全国的经济中心

C．全国的文化中心

D．国际交往中心（2）家住北京的中学生小明乘火车，沿京包—包兰线、___________线，从北京到乌鲁木齐进行观光考察。后来小明翻越①__________山脉进入了塔里木盆地，游览沙漠景观。在新疆逗留期间，还游览了如下图所示的当地著名的引水工程是____________。（3分）    

（3）小明发现当地的瓜果特别甜，请结合当地自然环境特点说明原因。（2分）

（4）小明又从西宁乘火车沿______________线到了拉萨。（１分）

（5）划分甲、丙两区域的主导因素是__________________。下列气温降水柱状图属于丁区域的是__________________。请简要说明丁区域形成这种气候特点的原因。____________________________________________（4分）

侨居甲国的中国公民田某在乙国旅行时遇车祸身亡。其生前在丙国某银行寄存有价值10万美元的股票、珠宝一批，在中国遗留有价值200万人民币的房产一处。田某在中国的父母要求继承这批股票和珠宝。我国与甲乙丙三国均无有关遗产继承的特别协议。依我国法律，前述股票和珠宝的继承应适用哪一国的法律( )。

A．中国法

B．甲国法

C．乙国法

D．丙国法