免疫球蛋白IgG、IgA、IgM的定量测定可采用
A．单向琼脂扩散法
B．散射免疫比浊法
C．EusA法
D．RIA法
E．以上四种方法均可
参考答案：E
“十五”时期，粮食产量最高的年份是哪一年( )
A．2002
B．2003
C．2004
D．2005
In relation to employment law:
(a) Explain the main difference between a contract of service and a contract for services. (2 marks)
