轨检车轨道Ⅲ、Ⅳ级超限报告表中各种偏差限值为实际幅值的()。
参考答案:半峰值
某一电源的路端电压与电流的关系和电阻R1、R2的电压与电流的关系如图所示.用此电源和电阻R1、R2组成电路.R1、R2可以同时接入电路,也可以单独接入电路.为使电源输出功率最大,可采用的接法是( )
A.将R1、R2串联后接到电源两端
B.将R1、R2并联后接到电源两端
C.将R1单独接到电源两端
D.将R2单独接到电源两端
-- Tom has made great progress.
-- _______, and _______.
A.So he has, so you have
B.So he has, so have you
C.So has he, so have you
D.So has he, so you have