专家判断法
参考答案：
是指邀请相关专家，根据市场预测的目的和要求为其提供资料，他们根据所提供的资料对事物未来发展变化的趋势进行估计和判断。
Bob has learned a lot from his _______ of working in different gyms and is now an expert on all kinds of _______.
A．experience; equipment
B．experience; equipments
C．experiences; equipment
D．experiences; equipments
连杆的大头与（）相联结。
