导游服务职业化主要原因是:导游人员数量的()和导游服务在旅游服务中的(),使得导游服务的地位逐步为社会所确认。
参考答案:增加 重要性
Little John hardly got anything in________ for his kind act, ________ made him unhappy.
A.award; as
B.reward; which
C.prize; which
D.medals; as
牙髓病的病因包括()。
A.细菌感染
B.创伤
C.温度刺激
D.激光
E.以上皆是