简述巴罗克时期的乐队结构。

When middle-aged Alex quit his job and made up his mind to become a self-employed writer， no one could tell for sure whether he would succeed or not. He found a cold storage room in a building, set up a used typewriter and settled down to work.

After a year or so, however, Alex began to doubt himself. He found it was difficult to earn his living by selling what he wrote. But Alex determined to put his dream to the test—even though it meant living with uncertainty and fear of failure. This is the shadowland (虚幻世界) of hope, and anyone with a dream must learn to live there.

One day Alex got a call,“We need an assistant, and we’re paying $6,000 a year.” $6,000 was real money in 1960. It would enable Alex to get a nice apartment ,a used car and more. Besides, he could write in his spare time. As the dollars were dancing in Alex’s head, something cleared his senses. He had dreamed of being a writer--full time. “Thanks, but no,” Alex said firmly and swiftly, “I’m going to stick it out and write.”

After Alex got off the phone, he pulled out everything he had: two cans of vegetables and 18 cents. Alex put the cans and cents into a paper bag, saying to himself, “There’s everything you’ve made of yourself so far. I’m not sure I ever felt so low.”

Finally his work was published in 1970.Instantly he had the kind of fame and success that few writers ever experience. The shadows had turned into focus of attention.

Then one day, Alex found a box filled with things he had owned years before. Inside was a paper bag with two cans and 18 cents. Suddenly he pictured himself working in that cold storage room. It reminds Alex, and anyone with a dream, of the courage and persistence(坚毅) it takes to stay the course(持续到底) in the shadowland.

小题1:Why did Alex give up his job?

A．Because he didn’t like the working conditions.

B．Because he couldn’t earn enough to make a living.

C．Because he wanted to be a full-time writer.

D．Because he felt he had no potential in his job.小题2:What did Alex express when he answered the call?

A．He refused the job offer.

B．He was willing to give them a hand.

C．He expected them to pay him more money.

D．He would write in his spare time.小题3:What kind of person is Alex?

A．determined

B．modest

C．shy

D．brave小题4:Which of the following can summarize the passage best?

A．Look before you leap

B．Two heads are better than one.

C．Hold on to your dream, and it will come true.

D．A bird in hand is worth two in the bush.

为了“探究加速度与力、质量的关系”，请思考探究思路并回答下列问题：

（1）为了消除小车与水平木板之间摩擦力的影响应采取做法是___________

A．将不带滑轮的木板一端适当垫高，使小车在钩码拉动下恰好做匀速运动

B．将不带滑轮的木板一端适当垫高，使小车在钩码拉动下恰好做匀加速运动

C．将不带滑轮的木板一端适当垫高，在不挂钩码的情况下使小车恰好做匀速运动

D．将不带滑轮的木板一端适当垫高，在不挂钩码的情况下使小车恰好做匀加速运动（2）在“探究加速度与力、质量关系”的实验中，得到一条打点的纸带，如图所示，已知相邻计数点间的时间间隔为T，且间距x₁、x₂、x₃、x₄、x₅、x₆已量出，则小车加速度的表达式为a=__________；实验中使用的电火花计时器使用　　　　电源(填“直流”或“交流”)，工作电压　　　　V.

（3）消除小车与水平木板之间摩擦力的影响后，可用钩码总重力代替小车所受的拉力，此时钩码m与小车总质量M之间应满足的关系为_______________；

（4）在“探究加速度与力的关系”时，保持小车的质量不变，改变小桶中砝码的质量，该同学根据实验数据作出了加速度a与合力F图线如图，该图线不通过坐标原点，试分析图线不通过坐标原点的原因．

答：　　　　　　　　　　　　　　　　　　　　　．

The mountain was _____ steep _____ few people in our city reached the top. [ ]

A. so; as

B. so; that

C. as; as

D. too; to

1971年意大利驻联合国代表说“向西方世界展现了迷人的中国文明”的一部书是指

A．《神曲》

B．《大唐西域记》

C．《战争与和平》

D．《马可·波罗行纪》

燃气灶漏气着火应如何处置？