如图1.3-22所示电路的谐振频率f为()Hz。
A.79.58
B.238.74
C.159.16
D.477.48
参考答案:A
Excuse me. Do you know________.
A.where is the hospital
B.when did they come
C.what his name is
D.how can I get there
景区导游面对的游客每天每团都不同,导游必须根据游客文化水平、知识结构、游览时间的差异随时变换自己的讲解内容和讲解风格,提高讲解的针对性,因此,掌握熟练的讲解技巧是做好景区导游的关键