推断性评价是依据统计检验的结果并以一定的（）对教育客观事物给予评价。
参考答案：置信度
—A number of students ____ on the playground.
—Let me count. The number of students ____ about 40.[ ]
A. are; is
B. is; are
C. are; are
D. is; is
肝移植术中哪一阶段循环干扰最大（）
A.打开腹腔时
B.探查肝脏时
C.阻断下腔静脉时
D.肝脏游离时
E.供肝吻合时
