It is hard to predict how science is going to turn out, and if it is really good science it is impossible to predict. If the things to be found are actually new, they are by definition unknown in advance. You cannot make choices in this matter. You either have science or you don’t, and if you have it you are obliged to accept the surprising and disturbing pieces of information, along with the neat and promptly useful bits.
The only solid piece of scientific truth about which I feel totally confident is that we are profoundly ignorant about nature. I regard this as the major discovery of the past hundred years of biology. It is, in its way, an illuminating piece of news. It would have amazed the brightest minds of the 18th century Enlightenment to be told by any of us how little we know and how bewildering seems the way ahead. It is this sudden confrontation with the depth and scope of ignorance tha
A. They invented false theories to explain things they didn’t understand.
B. They falsely claimed to know all about nature.
C. They did not believe in results from scientific observation.
D. They paid little attention to the problems they didn’t understan
{{B}}
Supermarket’s New
Strategy{{/B}} One supermarket in Tokyo has managed to solve the problems of shoplifting, mistakes by cashiers, and long lines of customers waiting at the cash registers. It is Japan’s advanced computer technology that has come{{U}} (51) {{/U}}with the answers. Shoppers at an OK supermarket on the outskirts of the city now push a cart{{U}} (52) {{/U}}a plastic card chained to it and buy from glass cases where the goods are on display. The plastic card has a magnetic number imprinted on it. Each customer carries his or her own card, which is{{U}} (53) {{/U}}at the exit. While shopping, the customer pushes the card into a slot beside whichever items are wanted and pushes a button or two. The glass covered vending machines are A. before B. when C. even if D. while [填空题]纽约中央公园的设计者是()。
[单选题]磁电系仪表的主要优点是准确度高、( )受外界影响小、功率消耗小等。
A.灵敏度高 B.灵敏度低 C.体积大 D.体积小 [单项选择]具有耳、肾毒性()。
A. 链霉素 B. 四环素 C. 复方新诺明 D. 氧氟沙星 E. 氨苄西林 [填空题]以下是一个比赛的评分系统,假设有8名评委,评分标准是去掉一个最高分和一个最低分,剩余分数的平均分即为选手的得分。试将程序补充完整。
Private sub Form_Click( ) Dim max as integer,min as integer,i as integer,num as integer,sum as integer,avg as single max=0 min=10 For i=1 to 8 num=val(inputbox("请输入分数" ) if 【13】 then max=hum if 【14】 then min=num sum=sum+num Next i sum= 【15】 avg=sum/6 Msgbox "最后得分:" & avg End sub [多选题]广播及集中控制的视频播放时间为()
A.7:00~12:30 B.7:30~12:30 C.15:30~21:30 D.15:00~21:30 [判断题] 城乡“低保户”和农村“五保户”每年每用电户设置120千瓦时的免费电量。
A.正确 B.错误 我来回答: 提交
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