如图,在高出海平面100米的悬崖顶A处,观测海平面上一艘小船B,并测得它的俯角为45°,则船与观测者之间的水平距离BC=____米.
─ Do you drink much coffee as before?
─ No, at all. My sleeping problem is getting worse.
____?
人物欣赏。