厂商利润最大化原则是（） A: MS=MC B: MS=MR C: MC=MR D: MA=MC

标准直齿圆柱齿轮，分度圆的直径d= A: ma B: mz C: mr D: mp

Complete the table below for a 4-20 mA signal: Process Level: Current Level: 5% ( )mA 25% ( )mA 50% ( )mA 75% ( )mA 95% ( ) mA

漏电开关额定漏电动作电流是，不动作电流是（） A: 20 mA、10 mA B: 24 mA、12 mA C: 25 mA、10 mA D: 30 mA、15 mA

She hung on to Ma and sobbed. A: said to Ma B: leaned against Ma C: pushed against Ma D: went to Ma

Putting in Order（排序题） Directions:Put the following parts into proper order to make a complete telephone message. A: ( )Will call again ( * ) Please call back ( * ) Urgent B: Operator: Cao Ming C: From: Mr. Ma Dong TelephoneNumber:021-82346759 To: Ms.ZhangXin Date: February 9,2006 Time: 10:30 a.m. D: Message:Mr.Ma Dong will go to Canada tomorrow and has something important to tell you. E: Telephone Message

如下图所示的超声速钝体扰流，1、2区马赫数分别为（ ）[img=478x484]180348f21ccc472.png[/img]‍ A: Ma<1 Ma<1 B: Ma>1 Ma>1 C: Ma<1 Ma>1 D: Ma>1 Ma<1

调幅系数ma的取值范围为（ ） A: ma＞1 B: 0＜ma≤1 C: ma =0 D: 1≤ma≤10

黄金交叉是指（）。 A: 股价远离长期与短期MA，短期MA又向上突破长期MA B: 股价站在长期与短期MA之下，短期MA又向下突破长期MA C: 股价站稳在长期与短期MA之上，短期MA又向上突破长期MA D: 股价远离长期与短期MA，短期MA又向下突破长期MA

图1到图6的二极管电流分别为mA、mA、mA、mA、mA、mA。设二极管的导通电压为0.7V。https://p.ananas.chaoxing.com/star3/origin/5959598e5c25722a2654565906cc5588.png