已知某污水总固体含量为680mg/L,其中溶解固体为420mg/L,悬浮固体中的灰分

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问题:

已知某污水总固体含量为680mg/L,其中溶解固体为420mg/L,悬浮固体中的灰分为60mg/L,则污水中的SS和VSS含量分别为( )。

A.200mg/L和60mg/L
B.200mg/L和360mg/L
C.260mg/L和200mg/L
D.260mg/L和60mg/L

考点:注册环保师环保专业基础水和废水监测与分析
题型:单项选择题

何为电解质含炭,发现电解质含炭应如何处理?

题型:单项选择题
情景交际(每小题1分,共5分)
根据对话内容,从方框中选择能填入空白处的最佳选项补全对话。
W: Excuse me ,sir.
M:Yes, what can I do for you,madam?
W:I have been here for an hour to meet my father.  小题1:
M:Are you sure of the time his flight arrives?
W:小题2: He told me he would reach the airport at about 1:00 this afternoon.
M:That’s true . Flight BA506 has just arrived.
W:What ?BA506?Well,I don’t think it’s his flight number.
M: 小题3:
W:Yes,it’s VA407. I think ...Oh,just a minute,please. Here   小题4:Sorry, it’s VA408.
M:VA408? I see,madam,the flight should arrive at 1:00,but it will be two hours and twenty minutes late because of the bad wether in New York.
W:Ok.小题5: Thank you very much,sir.
M:Good luck!Madam.
A.But I saw all the passengers come out except him.
B.Do you remember his flight number?
C.Then I will have to wait longer.
D.Yes,I think so.
E.I wrote it on my notebook.
 
题型:单项选择题

关于纯风险和投机风险,说法错误的是( )。

A.自然灾害、政治、社会方面的风险一般也都表现为纯风险

B.纯风险和投机风险两者往往不同时存在

C.纯风险重复出现的概率较大,表现出某种规律性

D.投机风险则是指既可能造成损失也可能创造额外收益的风险

题型:单项选择题

当柱平放起吊的()满足要求时,可以采用直吊绑扎法。

A、抗拉强度

B、抗压强度

C、抗弯强度

D、平整度

题型:单项选择题

大气的运动变化是由()引起的。

A.冷热不均

B.水汽交换

C.地壳运动

D.万有引力

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