问题
选择题
Nowadays, because the situation in Syria remains tense , a _______rise in crime upsets the
people there . [ ]
A. sharp
B. slight
C. natural
D. artificial
答案
答案:A
Nowadays, because the situation in Syria remains tense , a _______rise in crime upsets the
people there . [ ]
A. sharp
B. slight
C. natural
D. artificial
答案:A
某同学按如图所示的电路研究通过导体的电流跟导体电阻的关系,电源电压保持不变,他不断改变电阻箱R1(符号用
表示)的阻值,测得相应的电流如下表.
次数 | R1/Ω | I1/A |
1 | 2 | 0.40 |
2 | 4 | 0.32 |
3 | 8 | 0.25 |