在说明"不识庐山真面目，只缘身在此山中"这一现象时，最合理的解释是（）。A．美在无意

When something becomes fashionable very quickly , we say that it’s a “craze”. The latest craze is sometimes a style of clothes or a hairstyle. Sometimes it is a game or a TV programme.

In the 20^th century a lot of crazes started in the USA and then became popular in the USA andthen became popular in other parts of the world. American youth culture has spread through tourism , TV , films, magazines and music videos.

One of the biggest crazes was the hula hoop（呼啦圈）. Hula hoops are not popular now, but in the1950s they were a sensation.  An American company called Wham-O started to make plastic（塑料的）hoops toys, and in the USA the company sold 100 million hoops in a year.

Frisbees（飞盘）were another Wham-O product（产品）. Some people say that the idea

started in the factory of the Frisbee Baking Company in Connecticut. Workers there threw metal pans to each other during their breaks. Two businessmen made a plastic type of the flying pans,  and sold their products to Wham-O. They became a big business.

So businesses usually help to produce a craze. Yoyos were another example. In the Philippines,  where its name means “comeback”, the yoyo was a popular toy in the 1920s. But it didn’t become a global (世界性的) craze until an American called Donald Duncan bought the idea and sold it to the world. Around 100 million people bought yoyos in 1962 and 1963.

Most crazes come and go, but sometimes they survive. When the big skateboard started in California in 1965, many parents and governments said that the boards were dangerous, and they were not allowed in some areas. But the boards became popular again and they are still an important part of youth culture today.

小题1:What is a “craze” ?

A. A special culture in the western country.

B. Something that is liked by the young.

C. Something that first spreads in the USA.

D. Something that becomes very popular over a short period (时期) of time.

小题2:What does the underlined word “sensation” mean ?

A．昂贵的物品

B．值得珍藏的物品

C．轰动一时的物品

D．昙花一现的物品小题3:What fact does the passage provide ?

A．All crazes in the world come and go quickly.

B．Skateboards are not allowed in most areas of America.

C．In the last century the USA introduced many new crazes.

D．Crazes have nothing to do with culture.小题4: Which of the following can be chosen as the best title of the passage ?

A．Something about Crazes

B．Wham-O products

C．A successful Company

D．American Youth Culture

—Don’t be nervous whenever you have a test.

—________ .

A．You’d better not

B．Please don’t

C．Yes, I’d love to

D．Well , I won’t

实验室用水是将源水采用（）等方法，去除可溶性、不溶性盐类以及有机物、胶体等杂质，达到一定纯度标准的水

A、蒸馏

B、离子交换

C、电渗析

D、过滤

阐述选择生物教学方法的基本依据。

自动化仪表设备竣工验收阶段工作的工程验收步骤不包括（）。

A.分部工程验收

B.隐蔽工程验收

C.单位工程竣工验收

D.分项工程验收