单项选择题

A．Six Stages for Repairing Sam’’s Bicycle.
B．Possible Ways to Problem-solving.
C．Necessities of Problem Analysis.
D．Suggestions for Analyzing a Problem.
<上一题 目录 下一题>
热门 试题

填空题
transportation
单项选择题
It can be concluded that a concentration of carbon dioxide in the atmosphere would______.
A．mean a warming up in the Arctic
B．raise the temperature of the earth’’s surface
C．prevent the sun’’s rays from reaching the earth’’s surface
D．account for great changes in the climate in the northern hemisphere
相关试题