class Order implements Runnable { public void run () { try { Thread.sleep (2000) ; } catch (Exception e) System.out.print("in") ; public static void main (String [] args) { Thread t = new Thread (new Order ()) ; t.start () ; System.out.print ("pre ") ; try { t.join () ; } catch (Exception e) { } System.out.print ("post") ; 可产生哪两项结果?() [" pre in post"," pre in"," in post pre"," in pre post"," pre post i"]
现场临时用水包括()。 ["生产用水","生活用水","施工用水","机械用水","消防用水"]
解热镇痛药的解热作用,主要由于() ["作用于中枢,抑制PG合成","抑制内热原的释放","作用于外周,使PG合成","减少增加缓激肽的生成","抑制白三烯类释放"]
简述教师职业的价值。
饱和空气
简述现代汉语普通话的元音和韵母的区别有哪些?