为了保证对分包方的施工或服务条件符合分包工程的需要，总包方必须确认分包方从业人员的资格与能力，验证分包方的主要材料、设备和设施的要求。
参考答案：对
After the new technique was introduced, the factory produced _____ tractors in 1998 as the year before.[ ]
A. as many twice
B. as twice as many
C. twice as many
D. twice many as
信息系统的开发可采用多种模式： Ⅰ．委托开发 Ⅱ．合作开发 Ⅲ．自行开发 上述哪(些)种开发方式最有利于用户对系统的维护
A．Ⅰ
B．Ⅱ
C．Ⅲ
D．Ⅱ和Ⅲ
