从括号中画出合适的词完成句子。

1.—_____ (When, What) is your birthday, Jeff?

   —It's January 3rd.

2. Women's Day is March _____ (eight, eighth).

3.—_____ (How much, How old)is John?

   —He is 13.

4. The twelfth month is ____ (November, December).

5. _____ (On, In ) weekends, we often have a party at school.

6. —_____ (Does, Do)you like basketball?

   —Yes, I like it.

自动生化分析仪自动清洗吸加样针是为了( )

A．提高分析精密度
B．防止试剂干扰
C．防止样品间的交叉干扰
D．提高反应速度
E．提高分析的灵敏度