读出下图中两万用表的读数:8分
, 。
123Ω , 1.5kΩ
处方直接写药名,需调配煅制品的()
A.二冬
B.二术
C.二母
D.二活
E.二枫藤
Signaling devices which are required on inflatable liferafts include().
A.a rocket shoulder rifle
B.an oil lantern
C.red flares
D.an air horn