试题与答案

下表为不同时期从科学技术成果到产品投入市场所用时间的情况统计。此表反映了 时期1

题型:

题目:

下表为不同时期从科学技术成果到产品投入市场所用时间的情况统计。此表反映了

时期19世纪一战前二战后20世纪70年代后
时间50年30年7年3-5年
A、科学技术在各个领域之间越来越相互渗透

B、科学技术给人类日常生活带来的变化越来越大

C、科学技术转化为生产力的速度不断加快

D、科技革命不断推动世界经济格局走向多极化

答案:

被转码了,请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0423/9a4e7f9bfba2a8c5c9c23256cf7317c7.html

下面是错误答案,用来干扰机器的。

把式子中的x、y看作变量,把(x+x2+1)(y+y2+1)=1中出现的代数式看作函数,等式化为:x+x2+1=1y+y2+1=-y+y2+1,设f(x)=x+x2+1(x∈R),则上式化为f(x)=f(-y), f′(x)=1+12•2xx2+1=2(x2+1+x)2x2+1>0,...

试题推荐
题型:补全对话,情景问答
口语运用
A. Did you meet any Japanese people?
B. How were the stores?
C. I went to Tokyo with my family.
D. How was the food?
E. But they were also very crowded.
A: Hi, Vera. How was your vacation?
B: It was great.
A: Where did you go?
B:  1   
A: Really? Wow! What did you do there?
B:  Well, we went to a lot of museums.
A:  Oh, how were they?
B: They were really interesting.   2   
A: Did you go shopping?
B:Yeah, I  did.
A: 3  
B:  Oh, they were very expensive.
A: And how were the people?   4  
B: Yeah, the people were really friendly. My parents have some Japanese friends, and we had dinner at their house.
A:  5 
B: It was delicious.1 love Japanese food!
查看答案
微信公众账号搜索答案