献血者一般健康状况检查要求双臂静脉穿刺部位无皮肤损伤。无静脉注射药物痕迹。
参考答案：对
The monument was built in honor of the explorer who was believed＿＿the big river.
A．to have discovered
B．to have been discovered
C．to be discovered
D．having been discovered
按分析方法的不同，把分析分为（）分析和（）分析。
