便携式渗透探伤器材中一般不包括（）
A、渗透液
B、乳化液
C、显像剂
D、清洗液
参考答案：B
Although Jack has made good preparations for the match, he is still about his chance of winning.
A．stubborn
B．dynamic
C．sceptical
D．straightforward
联系实际说明日本商人的谈判风格。
