定量检测病人外周血免疫球蛋白常用的方法是()
A．间接血凝试验
B．双向琼脂扩散
C．单向琼脂扩散
D．外斐试验
E．ELISA
参考答案：C
After reading the school report, Tom really felt .
A．disappointed, disappointing
B．disappointing, disappointed
C．disappointing , disappointing
D．disappointed, disappointed
“东方”一词来源于（）。
