向目标人群宣传预防艾滋病知识,是希望改变影响行为的()
A.倾向因素
B.促成因素
C.强化因素
D.环境因素
E.以上都不正确
参考答案:A
---- Did the judge ask you many questions? ---- Yes, and ______.
A.they were difficult to be answered
B.to answer them was to be difficult
C.they were difficult to answer
D.they had difficulty in answering
非附着性龈下菌斑中最主要的细菌为
A.革兰阳性兼性菌
B.革兰阳性需氧菌
C.变形链球菌
D.革兰阴性厌氧菌
E.唾液链球菌