首页
登录
职称英语
There are about 105 males born for every 100 females, but this【B1】______ dr
There are about 105 males born for every 100 females, but this【B1】______ dr
游客
2024-06-02
1
管理
问题
There are about 105 males born for every 100 females, but this【B1】______ drops to near balance at the age of maturity, and among 70-year olds there are twice as many women as men. But the great universal of male【B2】______ is being changed. Now, boy babies【B3】______ almost as well as girls do. Fifty years ago, the chance of a baby(particularly a boy baby)surviving depended on its weight. A kilogram too light or too heavy【B4】______ almost certain death. Today it makes almost no【B5】______ . Since much of the variation is due to genes, one more agent of evolution has gone.
There is another way to【B6】______ evolutionary suicide: stay alive, but have fewer children. Few people are as【B7】______ as in the past. Nowadays the number of births, like the age of death, has become 【B8】______ .Again,【B9】______ .
For us, this means that evolution is over; the biological Utopia has arrived. Strangely, it has involved little physical change. No other species fills so many places in nature.【B10】______ . We did not evolve, because machines and society did it for us. Darwin had a phrase to describe those ignorant of evolution: they "look at an organic being as a savage looks at a ship, as at something wholly beyond his Comprehension." No doubt we will re- member a 20th century way of life beyond comprehension for its ugliness.【B11】______ . [br] 【B8】
选项
答案
average
解析
本空也应填入一形容词与become构成系表结构。average指“平均的”,本句是说目前出生率和死亡率已经接近了。
转载请注明原文地址:https://tihaiku.com/zcyy/3615737.html
相关试题推荐
Thereareabout105malesbornforevery100females,butthis【B1】______dro
Thereareabout105malesbornforevery100females,butthis【B1】______dro
Thereareabout105malesbornforevery100females,butthis【B1】______dro
Thereareabout105malesbornforevery100females,butthis【B1】______dro
Thereareabout105malesbornforevery100females,butthis【B1】______dro
Thereareabout105malesbornforevery100females,butthis【B1】______dr
Thereareabout105malesbornforevery100females,butthis【B1】______dr
Thereareabout105malesbornforevery100females,butthis【B1】______dr
Thereareabout105malesbornforevery100females,butthis【B1】______dr
Thereareabout105malesbornforevery100females,butthis【B1】______dr
随机试题
Today,therearemanyavenuesopentothosewhowishtocontinuetheireduca
Iusedtowatchherfrommykitchenwindow,sheseemedsosmallasshemuscl
下列()的爆炸属于化学爆炸。A.汽油桶 B.可燃气体 C.蒸汽锅炉 D.
瘢痕性类天疱疮可出现以下临床表现,除了()A.尼氏征阳性 B.小口
属阳的脉象是A、涩 B、洪 C、细 D、小 E、沉
触酶阴性的细菌是A.淋病奈瑟菌 B.腐生葡萄球菌 C.A群链球菌 D.脑膜
共用题干 ALuckyBreakActorAntonioBandera
酶的共价修饰最为常见的方式是A.磷酸化修饰B.乙酰化修饰C.甲基化修饰D.腺苷化
安全技术交底的内容有( )。A.危险因素 B.施工方案 C.操作规程 D
关于涂料防水的说法,正确的是()。A.有机防水涂料宜用于结构主体的背水面 B
最新回复
(
0
)