听力原文: The United States has the largest economy in the world. The size of an economy is usually described in terms of the Gross Domestic Product. The Gross Domestic Product, or G.D.P., is the value of all goods and services produced in a country in a year. In 2004, the United States had a G.D.P. estimated at close to 12 million dollars. What percentage of that was agriculture? The government says just 9/10 of one percent. Farm workers make up an even smaller percentage of American labor: 7/10 of one percent.
In 2004, almost 20 percent came from industry—and almost 80 percent came from services. The number of farms continues to decrease in America, whereas farm earnings have risen to record levels in recent years. Agricultural productivity continues to increase because of new technology and methods. But the Agriculture Department estimates that 9 percent of farm income last year came from government payments. That number is expected to decrease in the future.
Exports have provided American farmers with an average of about 25 percent of their money for the last 8 fifteen years. Canada and Mexico are two of the three biggest markets for American farmers. In fact, in 2002, Canada replaced Japan for the first time as the top buyer of American agricultural exports. The Department of Agriculture says exports to the European Union are slowing. But exports to other countries within the Americas and to Asia are growing.
(33)
A.American economy.
B.American agriculture.
C.American industry.
D.American GDP.
第1题
A.int a[3]= {1,2,3,0};
B.int a[3]= {1,2,3 }
C.int a[3]= {1+3,2,3};
D.int a[3]= {1};
第2题
以下各选项中能正确声明一个表示50个值为null的字符串数组的是()。
A.string [] a;
B.string a[];
C.ehar a[50][];
D.string a[]=new String[50];
第4题
以下各选项中能正确声明-个表示50个值为null的字符串数组的是()。
A.string[]a;
B.string a[];
C.char a[50][3]
D.string a[]=new string[50]
第5题
以下各选项中能正确声明一个表示50个值为null的字符串数组的是()。
A.string[]a;
B.string a[];
C.char a[50][];
D.string a[]=new String[50]
第6题
以下各选项中能正确声明一个表示50个值为null的字符串数组的是()。
A.string[]a;
B.stringa[];
C.chara[50][];
D.stringa[]=new String[50];
第7题
以下各选项中能正确声明一个表示50个值为null的字符串数组的是()。
A.string[]a;
B.string a[];
C.char a[50][];
D.string a[]=new String[50]
第9题
A.数组的长度必须在创建时给定,之后便不能改变
B.由于数组是对象,因此创建数组需要使用new运算符
C.数组内元素的类型可以不同
D.数组可以在声明的同时进行初始化
为了保护您的账号安全,请在“上学吧”公众号进行验证,点击“官网服务”-“账号验证”后输入验证码“”完成验证,验证成功后方可继续查看答案!