题目内容
示波器测RC串联电路波形时，如果R=2KΩ，C=100uF，激励方波的频率取多少可以获得较理想的电容充放电波形(待电容恰好充电完成就开始放电)
查看答案
搜索结果不匹配？点我反馈
更多问题
用示波器观察1Hz的正弦波，时基取多少，可清晰观察两个周期的完整波形（屏幕分十格）
The Grand Canyon in north-western ___ ____ is one of nature's most impeessive sights.
The United States went to war with ___ ____ in 1812, the last war fought between these two countries.
In 1932, in the depth of the depression, the American people chose ___ ____ as their next president who promised a "new deal" to get America out of depression.
微信支付 
支付宝支付