我国当前防爆电气标志根据新标准GB3836.1-2010,有了新的变化,即在原来的基础上增加了()。
A.接地方式
B.设备保护级别
C.设备防护措施
参考答案:B
集汇票、本票、支票的功能于一身的是:( )。
A.(A) 信用卡
B.(B) 借记卡
C.(C) 旅行支票
D.(D) 活期存款
A circle graph shows how the MegaTech corporation allocates its Research and Development budget: 14% microphotonics; 24% home electronics; 15% food additives; 29% genetically modified microorganisms; 8% industrial lubricants; and the remainder for basic astrophysics. If the arc of each sector of the graph is proportional to the percentage of the budget it represents, how many degrees of the circle are used to represent basic astrophysics research ?()
A. 8°
B. 10°
C. 18°
D. 36°
E. 52°