堂吉诃德的性格特征及其典型意义？

According to the passage all water pollutants come from household waste.

A．Y

B．N

C．NG

According to the passage, most water pollutants come from .

A. raw sewage

B. toxic chemicals

C. algae

D. household waste

According to the passage, recent pollution-control legislation aims to______.

A．control less visible as well as less hazardous chemical pollutants

B．increase the costs of pollution control and waste material disposal

C．have more strict control over less evident but often dangerous pollutants

D．eliminate all the hazardous chemical and gaseous pollutants

According to this passage, various types of packaging come into existence to ______.

A．meet the needs of consumers

B．suit all kinds of products

C．enhance the market position of products

D．introduce new products

According to this passage, various types of packaging come into existence to ______.

A．meet the needs of consumers

B．suit all kinds of products

C．enhance the market position of products

D．introduce new products

According to this passage, various types of packaging come into existence to______.

A．meet the needs of consumers

B．suit all kinds of products

C．enhance the market position of products

D．introduce new products

According to the passage, all of the following contribute to soil degradation EXCEPT

A．poor agricultural management

B．rotation of annual crops

C．accumulation of salts

D．lack of water drainage

According to the passage, new words tend to come from

A. world politics.

B. advances in science

C. areas of life.

D. all the above.

Which of the following statement is true according to the passage？

A．35% of technical reports published in scientific journals are written by scientist's doing their research in America.

B．35 % of all scientific journals are issued by American scientific societies.

C．35% of all scientists come from America.

D．35 % of all scientists are doing research at American institutions.