化石能源供应存在资源硬约束，未来开发利用空间有限。

今年熊妈妈37岁，小熊9岁。两年前，小熊年龄的几倍是妈妈的年龄？

有时引起极化的原因可能只有浓差极化。

My mother, Marisol Torres, came with her family to Australia in the early 1960s. Then my parents’ marriage ended and Mum began the study of precious stones. Her interest in opals (猫眼石) took her to the New South Wales remote town of Lightning Ridge. There were no luxuries (奢华的享受), but she was closer to nature and had a chance to find black opals and make some money.

My mother was beautiful with dark hair and brown eyes, but she was also quiet and shy. Early in the Ridge years, she kept to herself, but later, she started going to the neighbourhood centre to make friends.

It was her dream to mine, but her get-rich-quick thinking was unrealistic. She was cheated and she was never very successful. But she kept a sense of humour and a charming smile.

Then, just as friendships began to blossom, she was diagnosed with cancer and had to return south for treatment. She had the intention of cooking Spanish food as special treat for her Ridge friends, but died too soon. In her honour, my aunt, Marisa, and I fulfilled her desire when we visited the Ridge in March last year.

People who mine the Ridge come from a cross section of society, from lawyers to travels. Looks don’t mean much: it can be hard to tell who is millionaire and who is poor. Opals attracted Sebastian and Hanna Deisenberger to Lightning Ridge. They planned a two-year stay, but became permanent residents.

Then there’s Neil Schellnegger, 45, who moved to the area with his parents when he was a child. He lives with his son, Luke. Luke is a shy 19-year-old boy who enjoys helping his dad. They haven’t had much luck over the past couple of years, but their passion for opals conquers disappointment. They love the peaceful lifestyle.

Danny Hatcher, 38, is a second-generation miner and president of the Lightning Ridge Miners’ Association. He is an optimistic man, driven by the desire to find the perfect opal. “It’s magic,” he explains. “Once you start opal mining you don’t want to do anything else… There is always the potential for finding a million dollars. Nothing beats it.”

It’s a place where dreams --- spiritual or material --- can be fulfilled; a place, for one last bet in life.

小题1:What made the author’s mother go to Lightning Ridge?

A．The luxurious life there.

B．Her new marriage there.

C．Her interest in opals.

D．Her passion for nature. .小题2:After the author’s mother died, she fulfilled her desire by __________.

A．treating her mother’s Ridge friends with Spanish food

B．writing a biography about her whole life

C．decorating her house in Lightning Ridge

D．finding a lot of black opals in Lightning Ridge小题3:We know from the passage that _________.

A．the rich and the poor can be distinguished by their looks

B．Luke is a successful miner, just like his father

C．Sebastian is planning to leave Lightning Ridge

D．Danny Hatcher’s parents were miners in Lightning Ridge小题4:Lightning Ridge is a place where dreams can be fulfilled because __________.

A．there are precious stones and life is peaceful

B．there are people from all walks of life

C．there are rich people who can help poor people

D．there is a lot of gold hidden in the ground小题5:What is the author’s purpose of giving Neil Schellnegger and Danny Hatcher as examples?

A．To show the magic power of opal mining.

B．To tell people it isn’t always hard to mine opals.

C．To warn people not to take up this kind of job.

D．To persuade people to look for more resources for the country.

胸痹阴寒凝滞证，其临床特点是（）。

A.胸部刺痛，入夜尤甚

B.胸闷隐痛，时作时止

C.胸闷如窒，气短喘促

D.胸闷气短，畏寒肢冷

E.胸痛彻背，感寒痛甚

认为科学归纳法是获得真正知识的必由之路，为后来的教育学发展奠定了方法论基础的是（）

A.苏格拉底

B.夸美纽斯

C.培根

D.梅伊曼和拉伊