单项选择题

Passage One
Questions 26 to 29 are based on the passage you have just heard.

A．It influences the surface temperature of Mars.
B．It protects living beings from harmful rays.
C．It keeps a planet from overheating.
D．It is the main component of the air people breathe.
<上一题 目录 下一题>
热门 试题

单项选择题
Which of the following statements can best express the passage
A．Chilly weather puts the freeze on the E!/EMA Golden Globes party.
B．Relationships between pollutions and ecology.
C．The importance of ecology.
D．People should keep researching on society.
单项选择题
A．The high temperatures required for its use.B．The lack of trained environmental engineers.C．The opposition of automobile manufacturers.D．The high cost of materials used in its production.
A．The high temperatures required for its use.
B．The lack of trained environmental engineers.
C．The opposition of automobile manufacturers.
D．The high cost of materials used in its production.
相关试题