熔化极脉冲氩弧时,通常选择的脉冲频率在()Hz以下,如果脉冲频率超过此值时,则脉冲焊接特点消失。
A.140
B.120
C.160
D.190
参考答案:B
某企业所得税纳税人,2011年全年应纳税所得额为8.64万元,则所应缴纳的企业所得税为()。
A.2.16万元
B.1.44万元
C.2.4万元
D.2.64万元
A customer informed you that it is preferable to make a change to a certain aspect of the project. What should you do first
A.Talk with team members to understand implication of the chang
B.Communicate the change to management to get their input
C.Open up a change contro
D.Do sizing for the change and communicate to custome