It is appropriate to introduce the older to the younger, and woman to the man. ( )
查看答案
Don’t use first name to call others until you are invited to do so. ( )
A. 对
B. 错
Don’t give a firm handshakeas it shows you are aggressive. ( )
A. 对
B. 错
The Scandinavian cultures are kissing cultures. ( )
A. 对
B. 错
P77页图7-1为获得更多的主反应产物应该尽量保证在那个温度
A. 85
B. 65
C. 90
微信支付 
支付宝支付