【简答题】蓄电池正极板上的活性物质是 ,正极板通常呈 色;负极板上的活性物质是 ,负极板通常呈 色。
【单选题】854根据有关法律和进出口贸易的规定取得许可,专门保管外进口而暂未纳税的进出口货物的仓库称( )
【判断题】电路中的电流参考方向是电路中电流实际方向
【单选题】请在第__(50)__处填上正确答案。 查看材料
A.
Another distinction between science and technology has to do with the progress in each.
B.
Unlike science,progress in technology must be measured in terms of the human factor.
C.
What scientists discover may shock or anger people——as did Darwin’S theory of evolution.
D.
Science and technology are different.
E.
We are all familiar with the improper use of technology.
F.
Science is a method of answering theoretical questions;technology is a method of solving practical problems.
【多选题】Cubic crystal system includes:
【单选题】某地区去年粮食产量的环比增长速度为 3% ,今年为 4% ,则近两年该地区粮食产量共增长了( )。
【单选题】某地区粮食产量的环比增长速度,去年为3%,今年为4%,则这两年该地区粮食产量共增长了( )。