利用毛细管电泳芯片技术分离DNA，整个分离过程在45秒内，而芯片的长度仅为（） A.

阅读理解。

                                                          Red Star Restaurant

    The biggest and busiest restaurant in Ji'nan is seeking 20 waiters who have relevant (相关的) experiences

in high-grade restaurants. About ￥800-1,500 per month.

    Red Star Restaurant is located at 66 on Park Street.

    Our phone number is 0531-8278-4560. 

                                                            3 People wanted

    Need 3 people who would like to work 4 evenings per week showing films. Earn $300 per week possibly.

Call 469-867-6042. 

                                                           Baby-sitter wanted

    For a year. 3 days a week. Some flexible (灵活的) hours required.

    Knowledge: above senior middle school.

    Call 0431-478-9971.

1. How many advertisements are for waiters? [ ]

A. One.

B. Two.

C. Three.

D. Four.

2. What kind of people are needed in the second advertisement? [ ]

A. Film actors.

B. Film makers.

C. People to show films.

D. Film actresses.

3. In the third advertisement, the baby-sitter should _____. [ ]

A. have a year's working experience

B. accept flexible working hours

C. work two days a week

D. be girls

4. How many waiters does Red Star Restaurant need? [ ]

A. 10.

B. 20.

C. 30.

D. 40.

5. Where can you find these advertisements? [ ]

A. In the newspaper.

B. On TV.

C. On the radio.

D. In the textbook.

增加左旋多巴疗效，减少不良反应的药物是（）

A.卡比多巴

B.苯海索

C.利血平

D.维生素B₆

E.苯乙肼

在改善某一液晶板生产线的质量项目中，需要加电后目测出液晶板是否有瑕疵。由于检测工人的技术水平、认真态度等有差异，经常出现检测结果不一致的现象，若对该测量系统的一致性进行分析，需要用到下列哪种工具进行研究（）

A.Kappa分析

B.缺陷控制图

C.GRR%分析

D.可靠性分析

德育方法，其实质就是要解决（）的问题。

A.“教什么”

B.“如何教”

C.“为什么教”

D.“何时教”

雨篷梁是受弯、剪、扭的作用的构件。