为了保证静态保护装置本题的正常运行,最高的周围环境温度不得超过()度。
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In evacuation from a ship,an individual without the option of a survival craft or liferaft should enter the water on the leeward side,except when().
A. there is burning oil on the water
B. there is a rescue craft in the area
C. water temperature is below 40°F
D. a rigid survival craft is in the area
只要有人类社会存在,必然有教育现象,这说明了()
A. 教育的历史性
B. 教育的阶级性
C. 教育的永恒性
D. 教育的继承性