9.The trouble a creator faces is . A. the lack of strong motivation B. the absence of practical ideas C. how to search for more materials D. how to use imagination creatively
参考答案:
婴幼儿接触开放型肺结核病人后做 PPD 皮试最适当的时间是在接触后:A. 1 周 B. 2 周 C.
婴幼儿接触开放型肺结核病人后做 PPD 皮试最适当的时间是在接触后:A. 1 周 B. 2 周 C. 4 周 D. 8 周 E. 12 周