更多"Bear populations have decreased bec"的相关试题:
[单项选择]Ever since humans have live on the earth, they have made use of various forms of communication. Generally, this expression of thoughts and feelings has been in the form of oral speech. When there is a language barrier, communication is accomplished through sign language in which motions stand for letters, words, and ideas. Tourists and the people unable to hear or speak have had to resort to this form of expression. Many of these symbols of whole words are very vivid and exact and can be used internationally; spelling, however, cannot.
Body language transmits ideas or thoughts by certain actions, either intentionally or unintentionally. A wink can be a way of indicating that the part is only joking. A nod Signifies approval, while shaking the head indicates a negative reaction.
Other forms of nonlinguistic language can be found in Braille (a system of raised dots read with the fingertips), signal flags, Morse code, and smoke signals, Road maps and picture signs also guide, wa
A. When language is a barrier, people will find other forms of communication.
B. Everybody uses only one form of Communication.
C. Nonlinguistic language is invaluable to foreigners.
D. Although other forms, apart from language of communication exist, they are of little valu
[单项选择]
Because humans are at the top of the food chain, they are particularly vulnerable to the effects of nondegradable (不可能降解的)pollutants. This was clearly illustrated in the 1950s and 1960s when residents living near Minamata Bay, Japan, developed nervous disorders, shaking, and paralysis(瘫痪，麻痹) in a mysterious widespread. Over 400 people died before authorities discovered that a local industry had released mercury(水银，汞) into Minamata Bay. This highly toxic element stored up in the bodies of local fish and eventually in the bodies of people who consumed the fish. More recently research has revealed that many chemical pollutants are harmful to the human beings.
Pollution also has a dramatic effect on natural resources. Ecosystems such as forests, wetlands, and rivers perform many important services for the earth’s environment. They improve water and air quality, provide living places for plants and animals, and provide food and medicines. Any or all of these ecos
A. Pollution
B. Impact of Pollution
C. Affect of Pollution
D. Pollutants
[填空题]Some parents abuse their children because they have been treated in an extremely kind way during their childhood.
[单项选择]Passage TwoA. Because American negotiators have no patience.
B. Because American negotiators wouldn’t compromise.
C. Because foreign negotiators lack communlcating skills.
D. Because foreign negotiators like indirect interaction.
