对能量代谢率影响最为显著的因素是( )。
A.寒冷
B.高温
C.精神活动
D.肌肉运动
E.进食
参考答案:D
— Do you think the president will ____ to their demand?
— God only knows! [ ]
A. give up
B. give in
C. give away
D. give out
根据电工学规定安全电压是48V。