单项工程是指具有( ),建成后可独立发挥生产能力或效益的一组配套齐全的工程项目。
A.专业性质
B.主体结构
C.基础单元
D.独立设计文件
参考答案:D
肥达反应属于()Elek平板毒力试验属于()RPR属于()显微镜凝集()外斐试验()
A.ELISA
B.中和试验
C.沉淀试验
D.直接凝集试验
E.间接凝集试验
The students asked ____.
A.when is the sports meeting going to be held
B.when the sports meeting is going to be held
C.if was the sports meeting going to be held
D.if the sports meeting was going to be held