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

在处理阑尾时病人主诉恶心.胃痛，血压90/35mmHg，心率52次/分。

其处理首选()

A．哌替啶50mg

B．麻黄碱15mg

C．多巴胺4mg

D．阿托品0.3mg

E．氯胺酮30mg