《建设工程安全生产管理条例》规定，注册执业人员未执行法律、法规和工程建设强制性标准，

I have been living in the United States for twenty years ,but seldom _____ so lonely as now.

A．have I felt

B．I had felt

C．I have felt

D．had I felt

If transport costs _____ into consideration at the beginning, the factory would have been built far from its

present place. [ ]

A. will be taken

B. were taken

C. had been taken

D. were being taken

北京中关村是我国最早的高新技术开发试验区，其发展高新技术产业的有利条件是[ ]

A．自然资源丰富

B．交通便利

C．劳动力资源丰富

D．高等院校和科研院所多

低颅压性头痛的临床特征为（）

A.枕部或额部多见

B.多见于体弱女性

C.多伴恶心、呕吐

D.呈轻-中度钝痛或搏动样疼痛

E.体位性

土工织物撕裂试验所需仪器设备（）。

A.夹具

B.拉力机

C.量测设备

D.梯形模板

E.环形夹具