[单项选择] It was low tide on Cape Cod, and coastal naturalist Dick Hilmer was getting his feet wet a half mile off the Brewster shoreline. "Cape Cod was formed by glaciers 18,000 years ago," he told his small audience of journalists. "A mile-high sheet of ice moved down from the top of the world, and as it dropped rocks they formed the Cape. As the glacier went north, a mile and a half of sand dropped into Cape Cod Bay". And that is why current visitors to the Cape can walk so far out on the tidal flats at low tide, and stroll along 40 miles of sandy beaches that are now part of the U.S. National Seashore. As we walked, Hilmer pointed out the life all around us, from strands of sea lettuce to hermit crabs to periwinkles. The kids picked up razor clams, quahogs and other ephemera, some of it delightfully alive. Red tide (Alexandrium fundyense) on the Cape and north as far as Isle au Haut in Maine caused great damage to many of these sea lives in 2005. It was the most widespread outb
A. 399miles
B. a mile
C. 40miles
D. 65 miles

[单项选择] It was low tide on Cape Cod, and coastal naturalist Dick Hilmer was getting his feet wet a half mile off the Brewster shoreline. "Cape Cod was formed by glaciers 18,000 years ago," he told his small audience of journalists. "A mile-high sheet of ice moved down from the top of the world, and as it dropped rocks they formed the Cape. As the glacier went north, a mile and a half of sand dropped into Cape Cod Bay". And that is why current visitors to the Cape can walk so far out on the tidal flats at low tide, and stroll along 40 miles of sandy beaches that are now part of the U.S. National Seashore. As we walked, Hilmer pointed out the life all around us, from strands of sea lettuce to hermit crabs to periwinkles. The kids picked up razor clams, quahogs and other ephemera, some of it delightfully alive. Red tide (Alexandrium fundyense) on the Cape and north as far as Isle au Haut in Maine caused great damage to many of these sea lives in 2005. It was the most widespread outb
A. a journalist
B. a mountainous naturalist
C. an employee of Ocean Edge
D. a member of the Nickerson family

[名词解释]COD

[单项选择]某河段COD水质且标为20mg/L，实测断面COD浓度为10mg/L。，该断面的COD标准指数为（）。
A. 0.33 
B. 0.50 
C. 0.66 
D. 2.00

[简答题]The height of the tide is affected by the position of the sun, variations in the coast line and ______.

[简答题]The time that high tide occurs at a particular place is affected by the factors like the position of the moon, channels in the sea bottom and ______.

[简答题]If a strong wind is blowing toward the shore, tides would ______.

[单项选择]Speaker A: Could I borrow a twenty to tide me over till payday next Thursday
Speaker B: ______. I’ve just cashed the check. But do remember to pay me hack when your finances are in better shape.
A. You’re unlucky
B. You are in luck
C. You can’t expect me to help you
D. You are always happy

[填空题]

A．title
B．tide
C．ticket
D．tiger

[单项选择]某污水处理站采用“物化十生化”处理工艺。已知废水进水COD浓度为800mg/L、出口COD浓度不高于80mg/L，如“物化”处理单元COD去除率是60%，则“生化”处理单元COD去除率至少应达到（）。
A. 70% 
B. 75% 
C. 80% 
D. 83.3%

[不定项选择]酒精生产项目生产废水COD≥10000mg/L，须经厂内预处理使COD≤1000mg/L，方可排入二级污水污水处理厂的收集管网。可选用的污水处理方案有（）。
A. 调节→过滤→混凝→沉淀→排放
B. 调节→过滤→厌氧(UASB)→氧化沟→沉淀→排放
C. 调节→过滤→接触氧化→沉淀→排放
D. 调节→过滤→厌氧(UASB)→SBR→排放

[单项选择]某工厂年排废水200万t，废水中COD浓度为220mg/L，排入Ⅲ类水域，采用的废水处理方法COD去除率50%，Ⅲ类水体标准为100mg/L，则该厂COD排放总量控制为( )t/a。
A. 220
B. 180
C. 200
D. 250