Much new and high technology has been introduced from America,         great increase in production of the company.

A．resulting in

B．resulted in

C．leads to

D．having led to

下列属于施工安全技术应急措施的是( )。

A．高处作业的上下安全通道

B．通信联络和报警系统

C．场内运输道路及人行通道的布置

D．安全装置、报警装置、疏散口装置、避难场所等

E．有足够数量并符合规格的安全进、出通道