根据《中华人民共和国城镇国有土地使用权出让和转让暂行条例》，居住用地使用权的最高年限为( )年。
A．70
B．80
C．90
D．100
参考答案：A
Which statement is TRUE concerning radiotelephones on board towing vessels?（）
A.There cannot be a radiotelephone located anywhere except in the wheelhouse
B.The officer in charge of the wheelhouse is considered to have the radiotelephone watch
C.Only distress messages may be transmitted over channel 13
D.Only the Master of the vessel is allowed to speak over the radiotelephone
使血糖浓度下降的激素为( )
A．肾上腺素B．胰高血糖素C．生长激素D．甲状腺素E．胰岛素
