问题
解答题
“今有鸡、兔同笼，上有三十五头，下有九十四足，问鸡兔各几何”．题目大意：在现有鸡、兔在同一个笼子里，上边数有35个头，下边数有94只脚，求鸡、兔各有多少只．
答案
设有x只鸡，y只兔子，由题意得
，解得x+y=35 2x+4y=94
．x=23 y=12
答：笼子里有23只鸡和12只兔子．
搜题请搜索小程序“爱下问搜题”
“今有鸡、兔同笼，上有三十五头，下有九十四足，问鸡兔各几何”．题目大意：在现有鸡、兔在同一个笼子里，上边数有35个头，下边数有94只脚，求鸡、兔各有多少只．
设有x只鸡，y只兔子，由题意得
，解得x+y=35 2x+4y=94
．x=23 y=12
答：笼子里有23只鸡和12只兔子．
| It is often observed that the aged spend much time thinking and talking about their past lives, (1) about the future. These reminiscences are not simply random or trivial memories, (2) is their purpose merely to make conversation. The old person’s recollections of the past help to (3) an identity that is becoming increasingly fragile: (4) any role that brings respect or any goal that might provide (5) to the future, the individual mentions his past as a reminder to listeners, that here was a life (6) living. (7) , the memories form part of a continuing life (8) , in which the person (9) the events and experiences of the-years gone by and (10) on the overall meaning of his or her own almost completed life. As the life cycle (11) to its close, the aged must also learn to accept the reality of their own impending death. (12) this task is made difficult by the fact that death is almost a (13) subject in the United States. The mere discussion of death is often regarded as (14) .As adults many of us find the topic frightening and are (15) to think about it — and certainly not to talk about it (16) the presence of someone who is dying. Death has achieved this taboo (17) only in the modern industrial societies. There seems to bean important reason for our reluctance to (18) the idea of death. It is the very fact that death remains (19) our control; it is almost the only one of the natural processes (20) is so. |
A．keeps
B．draws
C．inclines
D．tends