若∠α的余角是30°，则∠α的补角是 [ ]
A、30°
B、60°
C、120°
D、150°
答案：C
The young man is a person of great perseverance(毅力), from which he ______ a lot.
A．satisfies
B．gains
C．awards
D．benefits
绝缘材料的性能不受温度的影响。
