问题 问答题

自来水是我国目前主要的生活饮用水,下表是我国颁布的生活饮用水水质标准的部分内容.

项目标准
感官

指标

无异味、异臭等
化学

指标

pH6.5~8.5

铜<1.0mg•L-1

铁<0.3mg•L-1

氟化物<1.0mg•L-1

游离氯≥0.3mg•L-1

(1)感官指标表现的是自来水的______性质(填“物理”或“化学”).

(2)化学指标“铜<1.0mg•L-1”中铜是指______(填“元素”、“单质”或“原子”).

(3)自来水中的游离氯有少量可转变成氯离子,氯离子的符号是______.

(4)实验室用自来水制取蒸馏水的方法是______.

A.吸附   B.沉淀    C.过滤    D.蒸馏

(5)长期饮用蒸馏水______(填“利于”或“不利于”)人体健康.

答案

(1)由物理性质和化学性质的概念可知二者的区别是:该性质是否需要经过化学变化表现出来;由图中信息可知,感官指标通常指的是物质的异味、臭味等,属于物理性质;故答案为:物理;

(2)化学指标“铜<1.0mg•L-1”中铜是指铜元素;故答案为:元素;

(3)离子符号的书写方法是在元素符合的右上方写出所带的电荷及电性,如氯离子Cl-;故答案为:Cl-

(4)实验室用自来水制取蒸馏水的方法是蒸馏;故选D;

(5)蒸馏水不含人体所必需的一些微量元素,故长期饮用对人体不利;故答案为:不利于.

单项选择题 A3/A4型题
阅读理解

An ancient Egyptian mummy thought to be that of Pharaoh Ramses I(法老一世)has returned home after more than 140 years in North American museums. The body was carried off the plane in Cairo in a box covered in Egypt’s flag.

The Michael Carlos Museum gave it back after tests showed it was probably that of the man who ruled 3,000 years ago. The US museum acquired it three years ago from a Canadian museum, which in turn is thought to have bought it from Egyptian garve robbers in 1860. The mummy was welcomed back home with songs and military band music during a ceremony at the national museum in Cairo.

Zahi Hawass, head of Egypt’s Supreme Council of Antiquities(文物最高委员会), traveled from the US with the body and said it would be moved next year to the Luxor Museum in southern Egypt. “We are not 100% sure that mummy is that of Ramses I,” said Mr. Hawass. “But we are 100% sure that it is of a king.”

Atlanta’s Michael Carlos Museum acquired the mummy in 1999, but offered to return it after hi-tech scanning equipment indicated it was likely to be that of Ramses I. The museum website said it had been acquired from the Niagara Falls Museum. It is thought a Canadian collector bought the mummy for the Niagara Falls Museum around 1860 from an Egyptian family which had came across a tomb filled with royal mummies at a site near Luxor.

Mr. Hawass praised the handover as “a great, civilized gesture”. And he appealed to other world museums to return Egypt’s antiquities, particularly the Rosetta Stone in the Britain Museum and the Bust of Nefertiti in the Berlin Museum.

小题1: Where was Ramses mummy kept in just before the handover?

A.the Luxor Museum

B.the Michael Carlos Museum

C.the Niagara Falls Museum

D.a Canadian Museum小题2:Which is the correct order of the following events according to the passage?

a. The mummy returned home.

b. The mummy was kept in the Niagara Falls Museum.

c. Egyptian grave robber sold he mummy.

d. A Canadian collector bought the mummy.

e. The mummy was kept in the Michael Carlos Museum.

A.c-d-e-b-a

B.c-b-e-d-a

C.a-d-c-b-e

D.c-d-b-e-a小题3: Which of the following statements is TRUE according to the passage?

A.All the Egypt’s antiquities have returned home after the handover.

B.Niagara Falls Museum is an American museum.

C.Buying the mummy from the Egyptian family was a civilized gesture.

D.Ramses Mummy had been kept in Canada for more than a century.小题4: What would be the best title for the passage?

A.The history of Ramses mummy.

B.The handover ceremony of Ramses mummy from Canada.

C.The returning of Ramses mummy to its homeland Egypt.

D.The history of the royal family of Ramses.