What does the example of three cars explain for? (). A: Unmanned vehicles are much better than manual in term of safe<br/>distance. B: Unmanned<br/>vehicles are much better than manual in term of reaction time. C: Unmanned vehicles can greatly reduce greenhouse gas emissions. D: Unmanned vehicles can greatly increase greenhouse gas emissions.

Give the Chines equivalent to the following term.greenhouse gases

Which of the following is not true about the greenhouse effect? A: Water vapour belongs to greenhouse gases. B: The greenhouse effect is a bad thing. C: Carbon Dioxide is the main greenhouse gas. D: The melting of the polar ice caps will accelerate because of the greenhouse effect.

以下求1*2*3......*20的程序正确的是: A: main(){inti,term;i=1;term=0;do{term=term*i;i++;}while(i<=20)<p="">printf("t=%d",term);} B: main(){inti,term;i=1;term=1;do{term=term*i;i++;}while(i<=20)<p="">printf("t=%d",term);} C: main(){inti,term;term=1;for(i=1,i<=20,i++)<p="">{term=term*i;i++;}printf("t=%d",term);} D: main(){inti,term;term=1;for(i=1;i<=20;i++)<p="">{term=term*i;i++;}printf("t=%d",term);}

4 Why can't we live in that＇greenhouse/green'house? A: ＇greenhouse B: green'house

The term of <br/>”Description of Goods” is the contract’s( ) A: Quality term B: Quantity term C: Name of the<br/>commodity term D: Description term

A（n） ___ term can be either positive or negative. A: A = assuring term B: G = guarding term C: D = discounting term D: E = evaluative term

Greenhouse gases are part of the atmosphere.

Carbon dioxide is greenhouse gas.

uildup of heat-trapping greenhouse gases