数控程序中刀具运动位置的坐标值的表现形式有（）。 A.直角坐标值 B.极坐标值 C.

动词运用。

     I'm an American boy. I 1______ (come) to China in 2006. I 2______ (study) here for two years. My

father often 3______ (take) me 4______ (play) football on the playground. Last Sunday, I 5______ (take)

to the park by him We saw a lot of monkeys 6______ (jump)in the tree. While I 7______ (walk) along the

rive, I heard a voice from behind. I thought to myself, "It must be Mr. Brown." I was right, it was Mr.Brown,

"Hello, Mr. Brown", I said, "Are you 8______ (take) photos here?" "Yes it's such a beautiful park." My friend

said. China is a great country. We really enjoy 9______ (live) here. Father says we 10______ (travel) back

to America for a short holiday next week.

关于年度培训计划设计的基本程序，下列说法错误的是（）。

A.前期准备阶段工作自上而下启动

B.培训调查与分析研究阶段要求召开统一培训会议来推动

C.年度培训计划的制订阶段采用自上而下方法

D.初步的部门级年度培训开发计划体现员工培训需求和部门培训需求两个层次

在质量管理体系文件中， ( )是产品质量水平和质量体系中各项质量活动进行和结果的客观反映，也可证明产品质量达到合同要求及质量保证的满足程度。

A．质量方针

B．质量手册

C．质量体系

D．质量记录

属于养老非系统风险的是（）。

A.社会风险

B.政治风险

C.经济风险

D.家庭风险

绘图题：画出三相全控桥＋A相快熔熔断后的输出波形。