If the cause of a sudden severe list or trim is negative initial stability,counter flooding into empty tanks may().
A. increase the righting moment
B. cause an increase in the righting arm
C. bring the unit to an upright equilibrium position
D. cause the unit to flop to a greater angle
某单层砖混结构建筑物,外墙高2.5m,长15m,宽5m(240mm厚灰砂墙),外墙上有四个1.5m×1.5m的窗和两个1m×2m的门。砌砖墙每立方米用砂浆0.26m³。需用砂浆()m。
A. 5.24
B. 5.35
C. 5.43
D. 5.51
中国邮票个性化的题材选题要本着()、积极向上的原则,符合社会主义精神文明建设和社会道德规范的要求。