甲乙两公司签订注册商标使用许可合同，规定甲公司许可乙公司使用其注册商标，该合同须经商标评审委员会核准。
参考答案：错
输电线路的电压等级在（）及以上。
A cabinet or space containing the controls or valves for the fixed firefighting system must be（）.
A.posted with instruction on the operation of the systm
B.ventilated and equipped with explosion-proof switches
C.painted with red and black diagonal stripes
D.equipped with a battery powered source of emergency lighting
