MRS

生活离不开化学．化学与我们生活息息相关．用下列生活中常见物质来完成以下各题：A．甲烷B．生石灰C．熟石灰D．乙醇E．淀粉F．蛋白质G．硝酸铵

（1）用物质的字母序号填空：

属于有机物的是______；属于盐的是______；

构成细胞的基本物质是______；属于氮肥的是______．

（2）写出生石灰制熟石灰的化学方程式______．

下列说法中，正确的是（     ）

A．生物圈就是地球上所有的生物和非生物成分

B．森林生态系统具有涵养水源、保持水土、防风固沙、调节气候、净化空气等作用，素有“绿色水库”“地球之肾”的称号。

C．农田生态系统是人工生态系统，生物种类相对较少，以农作物为主，结构简单，易退化。

D．各种生态系统之间并不是孤立的，而是紧密相连，相互影响，形成了一个统一的整体。

Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words

The automobile may not be closely associated with modem American culture, but it has occupied a central role in America’s economic and social history.

No one can deny the status of Henry Ford in car history. When the first Ford Model T rolled off the assembly line in 1908, businessman Henry Ford transformed the car from a luxury attachment for the rich to an automobile product for the middle classes. The rush of cars into the community forced all levels of government to build new and better roads. Better roads fed the demand for larger, faster, more stylish vehicles, and a host of companies rushed to meet that demand.

If there was a first Golden Age of automobile, it may well have been the 1950s. It was an age of prosperity. Large, regular paychecks encouraged the public display of wealth through costly items such as new cars. Americans, moreover, needed those cars as they moved away from the cities into the suburbs, where such things as stores, jobs, and schools were seldom within walking distance. Cars became essential if people were to get to work or to the grocery store.

As Ac 1950s slipped into 1960s, it became apparent that these fashionable wheels were gas-consuming road cruisers, dangerous in an accident, and often full of faults. Under pressure from a variety of groins, the federal government required that newer models provide greater fuel efficiency and cleaner emissions. Seatbelts became standard equipment as well Rising fad prices in the 1970s, coupled with concern for the environment, made the smaller cars produced by foreign companies for European and Asian markets very popular.

The 1980s and 1990s saw an upswing in the popularity of big cars. New models including minivans and sport utility vehicles have become main products in auto dealers’ showrooms. Traffic jams on the roads have become part of the American way of life. In 1911 a horse could travel through rush-hour traffic in Los Angeles at 11 miles per hour. In 2000 a car covering the same territory at the same time of day moved at about 4 miles per hour. But perhaps that is not important. When a car is equipped with a telephone and television set, a computer, and global positioning satellite connections, it can feel just like home.

(Note: Answer the questions or complete the statements in NO MORE THAN TEN WORDS.)

小题1:___________________made Henry Ford well-known in car history.

小题2:That the car industry prospered in the 1950s in America resulted from ________.

小题3: Why were smaller cars once popular in the 1970s?

小题4: In today’s society, how can a car make people ignore traffic jams?

深吸气量组成包括（）

A.补吸气容积

B.补呼气容积

C.残气量

D.潮气容积

E.肺活量

创新是民族进步的灵魂，是一个国家兴旺发达的不竭源泉。