Hfr菌是（）
A.溶原性细菌
B.含有R质粒的细菌
C.整合有F质粒的细菌
D.整合有前噬菌体的细菌
E.不产生性菌毛的细菌
参考答案：C
— Our holiday cost a lot of money.
— That doesn't matter _____ you enjoyed yourselves. [ ]
A. so long as
B. unless
C. even though
D. while
广义的导游语言包括导游讲解语言、体态语言和副语言。
