数字化彩超的关键技术是()
A.宽频探头
B.二次谐波成像
C.数字或波束形成仪
D.多道电子开关选择发射及接收的振子
E.预置多种优化检查条件
参考答案:A
保险经纪公司开展保险经纪业务工作有一事实上的程序,其程序内容包括()。
A.确定分保比例
B.支付分保保费
C.安排理赔事宜
D.签订委托协议书
How should you signal the crane operator to raise the boom and lower the load?().
A.Extend arm with the palm down and and hold this position rigidly
B.Place both fists in front of the body with the thumbs pointing outward each other
C.Clasp hands in front of you body
D.Extend arm with the thumb pointing up, and flex the finger s in and out for as long as the load movement is desired