目标人群失访比例超过多少，会影响健康教育评价，造成偏倚（）
A.5%
B.10%
C.15%
D.20%
E.25%
参考答案：B
During World War II Malta managed to _____ most of Italian and German bombers by throwing up an effective anti-aircraft screen.
A．put out
B．shut out
C．come across
D．get across
不属于栓剂的质量标准检查项目的是
A．重量差异B．融变时限C．药物溶出速度和吸收试验D．稳定性和刺激性试验E．硬度
