问题 单项选择题

有一海湾,某污染源向该海湾中排放污水流量为25000m3/d,则对该海湾进行环境现状调查的范围应为( )。

A.2.5~4 km2

B.5~10 km2

C.10~25 km2

D.15~40 km2

答案

参考答案:C

解析:
《环境影响评价技术导则 地面水环境》规定,不同污水排放量时海湾环境现状调查范围参考见下表。

不同污水排放量时海湾环境现状调查范围*参考表

污水排放量/(m3/d)调查范围
调查半径/km调查面积(按半圆计算)/km2
>500005~840~100
50000~200003~515~40
20000~100001.5~33.5~15

以排污口为圆心,以调查半径为半径的半圆形面积

单项选择题 A1/A2型题
阅读理解

He was the baby with no name. Found and taken from the north Atlantic 6 days after the sinking of the Titanic in 1912,his tiny body so moved the salvage (救援) workers that they called him “our baby.” In their home port of Halifax, Nova Scotia, people collected money for a headstone in front of the baby's grave (墓), carved with the words: “To the memory of an unknown child.” He has rested there ever since.

But history has a way of uncovering its secrets. On Nov. 5, this year, three members of a family from Finland arrived at Halifax and laid fresh flowers at the grave. “This is our baby,” says Magda Schleifer, 68, a banker. She grew up hearing stories about a great-aunt named Maria Panula,42, who had sailed on the Titanic for America to be reunited with her husband. According to the information Mrs. Schleifer had gathered, Panula gave up her seat on a lifeboat to search for her five children -- including a 13-month-old boy named Eino from whom she had become separated during the final minutes of the crossing. "We thought they were all lost in the sea," says Schleifer.

Now, using teeth and bone pieces taken from the baby's grave, scientists have compared the

DNA from the Unknown Child with those collected from members of five families who lost relatives on the Titanic and never recovered the bodies. The result of the test points only to one possible person: young Eino. Now, the family sees: no need for a new grave. "He belongs to the people of Halifax," says Schleifer. "They've taken care of him for 90 years."

Adapted from People, November 25, 2002

70. The baby travelled on the Titanic with his___________.

A. mother           B. parents           C. aunt         D. Relatives

71. What is probably the boy's last name?

   A. Schleiferi         B. Eino.            C. Magda.       D. Panula.

72. Some members of the family went to Halifax and put flowers at the child's grave on Nov. 5__.

A.  1912            B. 1954           C. 2002          D. 2004

73. This text is mainly about" how______________.

A. the unknown baby's body was taken from the north Atlantic

B. the unknown baby was buried in Halifax, Nova Scotia

C. people found out who the unknown baby was

D. people took care of the unknown baby for 90 years