电阻R1与R2并联在电路中，它们的等效电阻是10Ω．如果已知R1=15Ω，则R1

IP addresses are the unique sequence of numbers ______ to each computer, websites or other Internet-connected devices.

A．to assign

B．assigning

C．assigned

D．being assigned

凡士林为（）.

A．水溶性栓剂基质 

B．油溶性栓剂基质 

C．水溶性软膏基质 

D．油溶性软膏基质 

E．乳膏基质

医疗机构使用红处方的药品是：

A．精神药品

B．麻醉药品

C．医疗用毒性药品

D．放射性药品

E．戒毒药品

There, a big memorial has been built ____ him, who devoted himself to the poor. [ ]

A. in need of        

B. in face of

C. in memory of      

D.  in favor of

下列药物中，属于新一代胃黏膜保护剂的是

A．硫糖铝
B．丙谷胺
C．恩前列素
D．曲格列酮
E．哌仑西平