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问题 单项选择题

2017年中央一号文件指出，要进一步提高农业补贴政策的指向性和精准性，重点补（）

①主产区

②适度规模经营

③农民收入

④绿色生态

A.①②③

B.①②④

C.②③④

D.①②③④

答案

参考答案：D

单项选择题

In the United States, older people rarely live with their adult children. But in many other cultures children are expected to care (1) their aged parents. In some parts of Italy, the percentage of adult children who (2) with their parents (3) 65 to 70 percent. In Thailand, too, children are expected to take care of their elderly parents; few Thai elderly live (4) . What explains these differences in living arrangements (5) cultures Modernization theory (6) the extended family household to low levels of economic development. In traditional societies, the elderly live with their children in large extended family units for economic reasons. But with modernization, children move to urban areas, leaving old people (7) in (8) rural areas. Yet modernization theory cannot explain why extended family households were never common in the United States or England, or why families in Italy, which is fully modernized, (9) a p tradition of intergenerational living. Clearly, economic development alone cannot explain (10) living arrangements. Another theory associated intergenerational living arrangements with inheritance patterns. In some cultures, the stem family pattern of inheritance (11) . (12) this system, parents live with a married child, usually the oldest son, who then (13) their property when they die. The stem family system was once common in Japan, but changes in inheritance laws, (14) broader social changes brought (15) by industrialization and urbanization, have (16) the (17) .In 1960 about 80 percent of Japanese over 65 lived with their children; by 1990 only 60 percent did-a figure that is still high (18) U.S. standards, but which has been (19) steadily. In Korea, too, traditional living arrangements are (20) : the percentage of aged Koreans who live with a son declined from 77 percent in 1984 to 50 percent just 10 years later. Although most elderly Koreans still expect to live with a son, their adult children do not expect to live with their children when they grow old.

（9）是（）

A.maintain

B.promote

C.reserve

D.support
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单项选择题

在补码加法运算时，产生溢出的情况是( )。
Ⅰ两个操作数的符号位相同，运算时采用单符号位，结果的符号位与操作数相同
Ⅱ两个操作数的符号位相同，运算时采用单符号位，结果的符号位与操作数不同
Ⅲ运算时采用单符号位，结果的符号位和最高数位不同时产生进位
Ⅳ运算时采用单符号位，结果的符号位和最高数位同时产生进位
Ⅴ运算时采用双符号位，运算结果的两个符号位相同
Ⅵ运算时采用双符号位，运算结果的两个符号位不同

A．Ⅰ、Ⅲ、Ⅴ
B．Ⅱ、Ⅳ、Ⅵ
C．Ⅱ、Ⅲ、Ⅵ
D．Ⅰ、Ⅲ、Ⅵ
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