木板在什么情况下会下沉？河北邯郸邯邢矿山局中心校余清士题目如图１所示，有一回台形管子，下端管口用木板ＡＢ盖住，浸没于水中一定深度，若在管内注入Ｚｋｇ水时，则刚好使ＡＢ板下沉。试问下面哪种情况也可使ＡＢ板下沉？Ａ．把２ｋｇ的铝轻放在ＡＲ板中央Ｂ．把２ｋ... Under what circumstances will the board sink? According to Fig. 1, the topic of Qingshi in the Central School of Hebei Handan Mining and Mining Bureau shows that there is a mesa-shaped tube and the lower end of the tube is covered with a board AB, which is immersed in water with a certain depth. If Zkg water is injected into the tube, it is just AB. The board sinks. Which of the following situations can also cause the AB board to sink? A. Place 2kg of aluminum light in the center of the AR board B. Put 2k...