电路如图1所示，T1、T2和T3的特性完全相同，则I2≈ mA，I3≈0.2mA，则R3≈ kΩ。/js/editor20150812/themes/default/images/spacer.gif
举一反三
- 已知：则反应的稳定常数为/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif
- 3.The swimmer to cross the English Channel but failed./js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif
- 请分别填写:(1)u2=_____(V),i2=_______(mA),i3=_______(mA)*除不尽则填写化简后的分数。(2)u2=_____(V),i2=_______(mA),i3=_______(mA)(3)u2=_____(V),i2=_______(mA),i3=_______(mA)
- 在力法方程中，称为 ，表示 ，称为 ，表示 。/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif/js/editor20150812/themes/default/images/spacer.gif
- 已知向量 a 和 b 互相垂直，且 . 计算： |(3 a ＋ b )× ( a －2 b )|=84/js/editor20150812/themes/default/images/spacer.gif