Why is winter a disaster, a pervasive and constant threat, for the poor during wartime?
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Why does the author's mother stand brooding at the window for hours with a fixed stare?
Why does the author regard the metal container as something valuable?
【单选题】小丑鱼是以下哪个科目的鱼类?( )
A. 隆头鱼科
B. 雀鲷科
C. 虎虾鱼科
D. 鲀科
【单选题】以下那种生物的尖刺是有毒性的?( )
A. 铁锈柳珊瑚
B. 蓑鲉
C. 河豚
D. 小丑鱼
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