影响数控车床加工精度的因素很多，要提高加工工件的质量，有很多措施，其中采用混合编程方

用括号里的词的正确形式填空

1. Today, we saw the parades, all the_______(perform)wore______

(colour) clothes.

2. It was really_____________(cheer) to see the performance.

3. I saw many men smoking in public places today. I think it’s_____________ (polite). It’s ____________(harm) to not only the smokers but also others.

4. I was so_____________(care) that I lost my map on the way.

5. There was a long line of___________ (visit). The line seemed to be___________(end). We had to wait for a long time.

设置工资项目，项目名称：奖励工资。类型：数字。长度：8。小数位数：2。增减项：增项。

Lillie黑色素染色的正确结果是（）

A.黑色素呈黄色，背景不着色，肌纤维绿色

B.黑色素呈黑色，背景浅黄色，肌纤维不着色

C.黑色素呈黄色，背景浅棕色，肌纤维绿色

D.黑色素呈暗绿色，背景浅绿或不着色，肌纤维黄色

E.黑色素呈暗绿色，背景浅黄色，肌纤维红色

简述负反馈的类型。

简述人口迁移的影响。