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【单选题】
有一座竖流式沉淀池,其上升流速为v,斜板后为斜板沉淀池,如果斜板投影面积按竖流沉淀池面积的4倍计算,则改造后斜板沉淀池的临界沉速和去除效率与原有竖流式沉淀池相比,下列观点哪项是正确的?( )A.
斜板沉淀池可全部去除的最小颗粒沉速是u0=v/4
B.
斜板沉淀池可全部去除的最小颗粒沉速是u0=v/5
C.
斜板沉淀池去除效率是竖流沉淀池的4倍
D.
斜板沉淀池去除效率是竖流沉淀池的5倍
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【单选题】Drug use is rising dramatically among the nation's youth after a decade of decline. From 1993 to 1994, marijuana use among young people (1)_____ from 12 to 17 jumped 50 percent. One in five high schoo...
A.
aged
B.
aging
C.
age
D.
ages
【单选题】The prices have been rising all the time, especially that of housing. So it is high time the government _______ action to solve it.
A.
takes
B.
have taken
C.
took
D.
to take
【简答题】Teachers encourage the use of dictionaries so that
【多选题】The rising use of social networking sites could be attributed to _________.
A.
sociocultural forces
B.
technological forces
C.
legal forces
D.
economic forces
【单选题】选择如下Java代码,下列()方法可以将其加入到Sample类中,并且能够编译正确 public class Sample{ public int getSomething(int d){ return d; } }
A.
private int getSomething (int i,String s){}
B.
public void getSomething (int i){}
C.
private int getSomething(int i,String s){ return 20;}
D.
public double getSomething(){return "abc"}
【多选题】货币资金是企业流动性最强的资产,也即变现速度最快的资产。关于货币资金下列说法正确的有( )。
A.
当数额较大时说明企业支付能力较强
B.
数额较大时偿债和购货有较大保障
C.
数额较大时影响盈利能力形成机会成本
D.
金额越大越好
【单选题】The rising rate of house prices is usually faster than that of inflation and so the American government sometimes adjusts the property taxes to make it exceed the rate of inflation.
A.
Y
B.
N
C.
NG
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