南京临时政府成立不久，实业部电令各省从速设立实业司，以为各省实业管理机关。并指出，实业为将来民国生存命脉，“已成者当竭力保护，未成者当事先筹划”。这反映出（    ）

    Two farmers were on their way home one evening after a hard day's work．Both were tired．They happened to look up at the sky and saw a black cloud overhead．
    "Ah!" said one farmer, "tomorrow we shall have rain and the rice will grow well．" The second answered, "Nonsense （胡说）, the rain will only kill the crops （庄稼）．"
    So they began to fight．Just then a third farmer came along and asked them why they were quarreling（争吵）．Both farmers explained about the black cloud．
    "What cloud?" asked the third farmer．They all looked at the sky．The cloud was no longer there．

在探究二力平衡条件的实验中：

①向上排空气法  ②向下排空气法   ③排水法．