下列用来表示测量结果正确反映所欲测量的特点和功能的程度的是()
A.信度
B.效度
C.区分度
D.难度
参考答案:B
____ you are, _____ mistakes you will make in the exam.[ ]
A. The more careful; the fewer
B. The more careful; the less
C. The more carefully; the fewer
D. The more carefully; the less
某跨度为3m的悬臂梁的模板拆除,混凝土强度应达到设计强度等级的( )。
A.50% B.60%C.70% D.100%