【单选题】如果两个正弦交流电的相位差为 j = π 那么两者称为( )。
【单选题】The text is persuasive ______?
【多选题】what are the three types of persuasive speeches?
A.
persuasive speech on questions of policy
B.
persuasive speech on questions of value
C.
persuasive speech on questions of action
D.
persuasive speech on questions of facts
【判断题】Persuasive presentations are designed to give information to the listeners in an unbiased manner.()
【判断题】数控车床的特点是Z轴进给1mm,零件的直径减小2mm。( )