根据我国《宪法》规定，下列选项哪个是全国人民代表大会常务委员会有权进行部分修改的规范

已知椭圆的焦点为F₁（-t，0），F₂（t，0），（t＞0），P为椭圆上一点，且|F₁F₂|是|PF₁|，|PF₂|的等差中项．

（1）求椭圆方程；

（2）如果点P在第二象限且∠PF₁F₂=120⁰，求tan∠F₁PF₂的值；

（3）设A是椭圆的右顶点，在椭圆上是否存在点M（不同于点A），使∠F₁MA=90°，若存在，请求出点M的坐标；若不存在，请说明理由．

阅读理解

     The right to pursue happiness is issued to us all with our birth, but no one seems quite sure what it is.

     A holy man in India may think that happiness is in himself. It is in needing nothing from outside himself.

If wanting nothing, he lacks nothing. We westerners, however, are taught that the more we have from

outside ourselves, the happier we will be, and then we are made to want. We are even told it is our duty

to want. Advertising, one of our major industries, exists not to satisfy these desires but to create them---

and to create them faster than any man's money in his pocket can satisfy them. Here, obviously someone is trying to buy the dream of happiness and spending millions upon millions every year in the attempt. Clearly the happiness-market is not running out of customers.

     I doubt the holy man's idea of happiness, and I doubt the dreams of the happiness-market, too.

Whatever happiness may be, I believe, it is neither in having nothing nor in having more, but in changing

--- in changing the world and mankind into pure states.

     To change is to make efforts to deal with difficulties. As Yeats, a great Irish poet once put it, happiness we get for a lifetime depends on how high we choose our difficulties.

     It is easy to understand. We even demand difficulty for the fun in our games. We demand it because

without difficulty there can be no game. And a game is a way of making something hard for the fun of it.

The rules of the game are man-made difficulties. When the player ruins the fun, he always does so by

refusing to play by the roles. It is easier to win at chess if you are free, at your pleasure, to cast away all the rules, but the fun is in winning within the rules.

     The same is true to happiness. The buyers and sellers at the happiness-market seem to have lost their

sense of the pleasure of difficulty. Heaven knows what they are  playing, but it seems a dull game. And the Indian holy man seems dull to us, I suppose, because he seems to be refusing to play anything at all.

     The western weakness may be in the dreams that happiness can be bought while eastern weakness

may be in the idea that there is such a thing as perfect happiness in man himself. Both of them forget a

basic fact: no difficulty, no happiness.

1. Who shares the same idea of happiness with the author?

A. The Indian holy man                

B. The great Irish poet Yeats

C. Advertisers

D. The buyers and sellers at the happiness-market

2. What does "happiness-market" mean in the second paragraph?

A. It means a place in which people can buy things happily

B. It means a market which lacks happy customers

C. It means a pure state for the world and mankind

D. It means a market where people try to buy happiness with money.

3. According to the passage, which of the following is Right?

A. The Indian holy man is much happier than westerner.

B. The westerners understand happiness better than the Indian holy man.

C. There is no fun without playing by the rules

D. Both the eastern weakness and western weakness are the same.

国际收支持续逆差的国家，可能会加强外贸管制，则应考虑另辟该商品的出口市场。( )

位于A区的天龙公司与位于B区的地虎公司签订了一份化工原料购买合同。合同约定：天龙公司向地虎公司提供3.5吨位化工原料，交货地点为C区。另外还约定本合同履行过程中发生一切争议应由合同履行地人民法院管辖。合同签订后天龙公司未向地虎公司履行义务，地虎公司准备起诉，下列关于本案管辖的表述正确的是：

A．本案中的协议管辖约定不明确，如达不成补充协议，应由A区或C区法院管辖
B．本案中的协议管辖约定不明，如达不成补充协议，应由A区法院管辖
C．本案应由C区法院管辖，因为C区为合同履行地
D．本案应由C区法院管辖，因为协议管辖的约定有效

与企业集体协商时，协商代表应依照法定程序产生，双方的代表人数应当对等，每方至少（）人，并各确定1名首席代表，双方协商代表不得相互兼任。

A.3

B.4

C.5

D.6