实验室用加热氯酸钾和二氧化锰的混合物制取氧气，在这一过程中，二氧化锰在固体混合物中的质量分数w与时间t变化关系的图象，正确的是（　　）

    The GRAMMY Museum is a musically fascinating journey of music in downtown Los Angeles. Turn up the beat over four floors of modern exhibits, interactive(互动的) experiences and interesting films that will give you a one-of-a-kind experience. They want to engage you, educate you, and inspire you — just like music does!

    There are over 30,000 square feet of interactive, traveling and permanent (永久的) exhibits. This includes over two dozen exhibits along that explore the greatest of the GRAMMY music! Your whole family will find something they love — rock, classical, hip hop to country…

    The Crossroads exhibition invites you to explore nearly 160 kinds of music! Open them up on the interactive table in front of you to show photos, songs and stories that describe the influence that music has on the world, as well as the music itself.

    Journey down the Songwriters Hall of Fame. How many of these songs do you know? How many songwriters have you heard of? You can also try writing a song with some songwriters in the songwriting kiosks(自助式服务设备)!

    Have you wondered how a song gets from someone's head to your radio? The third floor shows the art of recording.

    The museum always has a host of programs and events throughout the year, so make sure you keep up to date — you won't want to miss out!

HOW MUCH DOES IT COST?

Adults: $ 12.95

Children: $ 10.95 (6-17 yrs)

Free: under 5 years old

WHEN CAN WE GO?

Mon-Fri: 11:30 am – 7:30 pm

Weekends: 10:00 am – 7:30 pm

    Sometimes shut for private events, so check before you go.

    The GRAMMY Museum is a musically fascinating journey of music in downtown Los Angeles. Turn up the beat over four floors of modern exhibits, interactive(互动的) experiences and interesting films that will give you a one-of-a-kind experience. They want to engage you, educate you, and inspire you — just like music does!

    There are over 30,000 square feet of interactive, traveling and permanent (永久的) exhibits. This includes over two dozen exhibits along that explore the greatest of the GRAMMY music! Your whole family will find something they love — rock, classical, hip hop to country…

    The Crossroads exhibition invites you to explore nearly 160 kinds of music! Open them up on the interactive table in front of you to show photos, songs and stories that describe the influence that music has on the world, as well as the music itself.

    Journey down the Songwriters Hall of Fame. How many of these songs do you know? How many songwriters have you heard of? You can also try writing a song with some songwriters in the songwriting kiosks(自助式服务设备)!

    Have you wondered how a song gets from someone's head to your radio? The third floor shows the art of recording.

    The museum always has a host of programs and events throughout the year, so make sure you keep up to date — you won't want to miss out!

HOW MUCH DOES IT COST?

Adults: $ 12.95

Children: $ 10.95 (6-17 yrs)

Free: under 5 years old

WHEN CAN WE GO?

Mon-Fri: 11:30 am – 7:30 pm

Weekends: 10:00 am – 7:30 pm

    Sometimes shut for private events, so check before you go.

    Albert Hofmann was a Swiss Scientist who was fascinated by nature. This led him to a career in chemistry in which he sought answers to his uncertainties. He worked at Sandoz Laboratories where he nurtured his research work, and there he made a lot of success by working with various plants and changing them into something useful. He became famous when he became the first person to produce lysergic acid diethylamide (LSD) (迷幻药). In addition, he was also the first person to taste it and learn about its hallucinogenic (勾起幻觉的) effects. He was deeply connected to the nature and argued that LSD, besides being useful for psychiatry(精神病学), could also be used to promote awareness of mankind's place in nature. However, he was disappointed that his discovery was being carelessly used as a drug for entertainment. Because of his discovery, LSD fans have fondly called him “The father of LSD”. Besides carrying out his scientific experiments, he also authored numerous books and more than 100 scientific articles. In 2007, he featured in a list of the 100 greatest living geniuses(天才), published by The Telegraph Newspaper.

Childhood & Early Life

    Albert Hofmann was born in Baden, Switzerland, on January 11, 1906. He was the eldest of four children. His father was a poor toolmaker in a factory and they lived in a rented apartment. He spent much of his childhood outdoors, and grew up with a very deep connection with nature.

    He had mind-blowing experiences in childhood, wherein nature was changed in magical ways that he didn't understand. These experiences caused questions in his mind, and chemistry was the scientific field which allowed him to understand them.

    He studied chemistry at Zurich University, and his main interest is the chemistry of plants and animals. At 23, he earned his Ph. D with honors.

    Once upon a time, there lived two parent parrots. Every morning they flew out to 1 food for their two young birds. One day, a hunter 2 the young birds. The young birds 3 to free themselves from the hands of the hunter. One 4 from the hunter, while the other was taken in a cage by the hunter to his house. He gave it to his 5.

    The other parrot flew away and came to a place where some holy men lived. They did not 6 the young parrot, so it stayed there. It 7 their talk and learned to say a few words.

    Several years later, a traveler was walking near the hunter's hut(小屋). He sat near the hut, extremely 8. He heard the parrot that lived there say, “9, why have you come here? I will cut your throat.” The traveler 10 got up and left the place in a hurry. Then he happened to reach the place where the other parrot lived. The parrot was sitting on a tree. Seeing the traveler, it said, “Welcome, traveler. Welcome to this hermitage(偏僻的寺院). We have a lot of good 11 in this forest, which looks sweet and delicious. Eat whatever you like. The holy men will 12 you well.”

    The traveler was 13. He couldn't understand why this parrot was so polite 14 the other one was so rude. They were both parrots, after all. 15 it wasn't strange. The parrot he met first lived with the hunter's children who often spoke 16 words, while the parrot he met later had learned the 17 of holy people.

    Our growing environment is of great 18. It is the company that shapes our words and deeds. Good company helps us learn good things while bad company 19 the contrary. Therefore, choose the 20 people to grow up with.