用于日本分体吸虫病诊断的免疫学方法,具有早期诊断价值的是()
A.间接血凝试验
B.环卵沉淀试验
C.酶联免疫吸附试验
D.胶体染料试纸条法
E.粪便毛蚴孵化法
参考答案:B
With the fresh water ____ short, we human beings are facing the danger of dying from thirst at any time. [ ]
A. to run
B. be run
C. running
D. run
电热清蜡的原理是什么?