【单选题】晶闸管中频电源能自动实现()调节,在金属加热和熔炼的全过程中,中频频率始终适应负载振荡回路谐振的需要。
【简答题】How much does the shop assistant offer to reduce at first?
【单选题】?Read the following extract from an article about the advantages of making the first offer/demand in negotiation. ?For each question 15—20, mark one letter (A, B, C, or D) on your Answer Sheet for the...
A.
Creating a psychological advantage.
B.
A powerful statement that manipulates the perception of others.
C.
Taking the initiative.
【单选题】在振荡回路中,当外加电源的频率与回路固有振荡频率相同时所发生的现象,称为()。
【判断题】在电路中,导线把电流从电源引出,通过负载再送回电源,构成电流的完整回路。()
【多选题】管理者基本技能主要由( )三种能力构成 A. 概念技能 B.人际技能 C.人际沟通能力 D.技术技能 E.营销技能
【单选题】At first sight, it ________ look like a generous offer; actually, it is a trick.
【单选题】在直流电路的计算中,已知电源电压E=12 V, 电源内阻r=0. 5