在新民主主义的五种经济成分中，属于过渡形式的经济成分是___________。
The engine has broken and the boat is ______ on the water.
某人向同一目标独立重复射击, 每次射击命中目标的概率为 p(0< p<1), 则此人第 4 次射击恰好第 2 次命中目标的概率为（）
Matter is the name ________ (give) to everything which has weight and occupies space.
________ (fail) several times, they need some encouragement.
