Scientists are carrying __小题1:_____ experiments into using spiders’ cobweb to produce __小题2:____(extreme ) thin wire. The research _小题3:____( conduct) by researchers from Germany. They have developed __小题4:___process for reducing spiders’ silk _小题5:___about one twentieth of its normal diameter.

__小题6:___ is hoped that this new wire will be effective in the __小题7:____(grow) field of micro-electronics. They have collected data on the properties of spider silk. Their work has found evidence _小题8:____ the silk of the black widow spider would be the __小题9:____ (idea)material for the new “nanowires”. It seems even the deadly black widow can serve the cause __小题10:___ the scientific progress.

胆囊动脉多数源自于

A．肝左动脉

B．肝固有动脉

C．胃、十二指肠动脉

D．肝总动脉

E．肝右动脉